﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2024v5.5">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2026-02-02T09:21:33-06:00</ReturnTs>
    <TaxPeriodEndDt>2024-12-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>931743146</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>Eifel Rambo Advisory Group Ltd</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>20635 Abbey Woods Ct Suite 301</AddressLine1Txt>
        <CityNm>Frankfort</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60423</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2024-01-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>911848185</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>Lake Katherine Nature Center and Botanic</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>Gardens</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>LAKE</BusinessNameControlTxt>
      <PhoneNum>7083611873</PhoneNum>
      <USAddress>
        <AddressLine1Txt>7402 Lake Katherine Drive</AddressLine1Txt>
        <CityNm>Palos Heights</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60463</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>Paul Kubik</PersonNm>
      <PersonTitleTxt>Chair</PersonTitleTxt>
      <PhoneNum>7083611873</PhoneNum>
      <SignatureDt>2026-01-26</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <IRSResponsiblePrtyInfoCurrInd>0</IRSResponsiblePrtyInfoCurrInd>
    <PreparerPersonGrp>
      <PreparerPersonNm>Matt Beckley</PreparerPersonNm>
      <PTIN>P00331163</PTIN>
      <PhoneNum>7086282365</PhoneNum>
    </PreparerPersonGrp>
    <TaxYr>2024</TaxYr>
    <BuildTS>2025-03-06 01:10:19Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="5">
    <IRS990 documentId="RetDoc1038000001" referenceDocumentId="RetDoc1044400001">
      <PrincipalOfficerNm>Paul Kubik</PrincipalOfficerNm>
      <USAddress>
        <AddressLine1Txt>7402 Lake Katherine Drive</AddressLine1Txt>
        <CityNm>Palos Heights</CityNm>
        <StateAbbreviationCd>IL</StateAbbreviationCd>
        <ZIPCd>60463</ZIPCd>
      </USAddress>
      <GrossReceiptsAmt>432090</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>0</GroupReturnForAffiliatesInd>
      <Organization501c3Ind>X</Organization501c3Ind>
      <WebsiteAddressTxt>www.lakekatherine.org</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>1994</FormationYr>
      <LegalDomicileStateCd>IL</LegalDomicileStateCd>
      <ActivityOrMissionDesc>Environmental stewardship and gardens in a unique urban setting</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>13</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>13</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>7</TotalEmployeeCnt>
      <TotalVolunteersCnt>0</TotalVolunteersCnt>
      <TotalGrossUBIAmt>0</TotalGrossUBIAmt>
      <NetUnrelatedBusTxblIncmAmt>0</NetUnrelatedBusTxblIncmAmt>
      <PYContributionsGrantsAmt>86086</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>104821</CYContributionsGrantsAmt>
      <PYProgramServiceRevenueAmt>134208</PYProgramServiceRevenueAmt>
      <CYProgramServiceRevenueAmt>132017</CYProgramServiceRevenueAmt>
      <PYInvestmentIncomeAmt>2612</PYInvestmentIncomeAmt>
      <CYInvestmentIncomeAmt>6027</CYInvestmentIncomeAmt>
      <PYOtherRevenueAmt>217563</PYOtherRevenueAmt>
      <CYOtherRevenueAmt>180767</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>440469</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>423632</CYTotalRevenueAmt>
      <PYGrantsAndSimilarPaidAmt>0</PYGrantsAndSimilarPaidAmt>
      <CYGrantsAndSimilarPaidAmt>0</CYGrantsAndSimilarPaidAmt>
      <PYBenefitsPaidToMembersAmt>0</PYBenefitsPaidToMembersAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <PYSalariesCompEmpBnftPaidAmt>152058</PYSalariesCompEmpBnftPaidAmt>
      <CYSalariesCompEmpBnftPaidAmt>29399</CYSalariesCompEmpBnftPaidAmt>
      <PYTotalProfFndrsngExpnsAmt>0</PYTotalProfFndrsngExpnsAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>39627</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>233076</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>279426</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>385134</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>308825</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>55335</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>114807</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>520950</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>573540</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>86021</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>28807</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>434929</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>544733</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <MissionDesc>The mission of Lake Katherine Nature Center and Botanic Gardens is to connect people with nature.By engaging the public with Lake Katherine and applying current stewardship practices to this reclaimed land, we strive to create a place that invites human interaction with natural spaces through learning about nature, expanding knowledge of good ecological practices, and welcoming recreation and reflection.</MissionDesc>
      <SignificantNewProgramSrvcInd>0</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>0</SignificantChangeInd>
      <ExpenseAmt>203394</ExpenseAmt>
      <Desc>Educate and promote the general public awareness of the preserve and the environment. Increase general public participation in the development and maintenance of the preserve. This is accomplished through the learning center and through a variety of seasonal festivals.</Desc>
      <TotalProgramServiceExpensesAmt>203394</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind referenceDocumentId="RetDoc1039100001">1</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd referenceDocumentId="RetDoc1234500001">1</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>0</LobbyingActivitiesInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <DonorAdvisedFundInd referenceDocumentId="RetDoc1040000001">0</DonorAdvisedFundInd>
      <ConservationEasementsInd referenceDocumentId="RetDoc1040000001">0</ConservationEasementsInd>
      <CollectionsOfArtInd referenceDocumentId="RetDoc1040000001">0</CollectionsOfArtInd>
      <CreditCounselingInd referenceDocumentId="RetDoc1040000001">0</CreditCounselingInd>
      <DonorRstrOrQuasiEndowmentsInd>1</DonorRstrOrQuasiEndowmentsInd>
      <ReportLandBuildingEquipmentInd referenceDocumentId="RetDoc1040000001">0</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd referenceDocumentId="RetDoc1040000001">0</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd referenceDocumentId="RetDoc1040000001">0</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd referenceDocumentId="RetDoc1040000001">0</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd referenceDocumentId="RetDoc1040000001">1</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd referenceDocumentId="RetDoc1040000001">1</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd referenceDocumentId="RetDoc1040000001">1</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd referenceDocumentId="RetDoc1040000001">0</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>0</SchoolOperatingInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <ForeignActivitiesInd>0</ForeignActivitiesInd>
      <MoreThan5000KToOrgInd>0</MoreThan5000KToOrgInd>
      <MoreThan5000KToIndividualsInd>0</MoreThan5000KToIndividualsInd>
      <ProfessionalFundraisingInd>0</ProfessionalFundraisingInd>
      <FundraisingActivitiesInd>0</FundraisingActivitiesInd>
      <GamingActivitiesInd>0</GamingActivitiesInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <GrantsToOrganizationsInd>0</GrantsToOrganizationsInd>
      <GrantsToIndividualsInd>0</GrantsToIndividualsInd>
      <ScheduleJRequiredInd>0</ScheduleJRequiredInd>
      <TaxExemptBondsInd>0</TaxExemptBondsInd>
      <EngagedInExcessBenefitTransInd>0</EngagedInExcessBenefitTransInd>
      <PYExcessBenefitTransInd>0</PYExcessBenefitTransInd>
      <LoanOutstandingInd>0</LoanOutstandingInd>
      <GrantToRelatedPersonInd>0</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd>0</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd>0</BusinessRlnWithFamMemInd>
      <BusinessRlnWith35CtrlEntInd>0</BusinessRlnWith35CtrlEntInd>
      <DeductibleNonCashContriInd>0</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd>0</DeductibleArtContributionInd>
      <TerminateOperationsInd>0</TerminateOperationsInd>
      <PartialLiquidationInd>0</PartialLiquidationInd>
      <DisregardedEntityInd>0</DisregardedEntityInd>
      <RelatedEntityInd>0</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>0</TrnsfrExmptNonChrtblRltdOrgInd>
      <ActivitiesConductedPrtshpInd>0</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>1</ScheduleORequiredInd>
      <IRPDocumentCnt>1</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <BackupWthldComplianceInd>1</BackupWthldComplianceInd>
      <EmployeeCnt>7</EmployeeCnt>
      <EmploymentTaxReturnsFiledInd>0</EmploymentTaxReturnsFiledInd>
      <UnrelatedBusIncmOverLimitInd>0</UnrelatedBusIncmOverLimitInd>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <TaxablePartyNotificationInd>0</TaxablePartyNotificationInd>
      <NondeductibleContributionsInd>0</NondeductibleContributionsInd>
      <QuidProQuoContributionsInd>0</QuidProQuoContributionsInd>
      <Form8282PropertyDisposedOfInd>0</Form8282PropertyDisposedOfInd>
      <IndoorTanningServicesInd>0</IndoorTanningServicesInd>
      <SubjToTaxRmnrtnExPrchtPymtInd>0</SubjToTaxRmnrtnExPrchtPymtInd>
      <SubjectToExcsTaxNetInvstIncInd>0</SubjectToExcsTaxNetInvstIncInd>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <GoverningBodyVotingMembersCnt>13</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>13</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>0</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>0</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>0</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>0</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>0</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>0</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>0</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>1</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>1</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>0</OfficerMailingAddressInd>
      <LocalChaptersInd>0</LocalChaptersInd>
      <Form990ProvidedToGvrnBodyInd>1</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>1</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>1</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>1</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>0</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>1</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>0</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>0</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>0</InvestmentInJointVentureInd>
      <StatesWhereCopyOfReturnIsFldCd>IL</StatesWhereCopyOfReturnIsFldCd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <PersonNm>Bridget Provost</PersonNm>
        <PhoneNum>7083611873</PhoneNum>
        <USAddress>
          <AddressLine1Txt>7402 Lake Katherine Drive</AddressLine1Txt>
          <CityNm>Palos Heights</CityNm>
          <StateAbbreviationCd>IL</StateAbbreviationCd>
          <ZIPCd>60463</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <Form990PartVIISectionAGrp>
        <PersonNm>Paul Kubik</PersonNm>
        <TitleTxt>Chairperson</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Jill Moss Stetson</PersonNm>
        <TitleTxt>Vice-Chairperson</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Terry Heafy</PersonNm>
        <TitleTxt>Treasurer</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>MaryLee Lockwood</PersonNm>
        <TitleTxt>Secretary</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Heather Begley</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Walter Benard</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Susan Doherty</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Terry Horvath</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Jeannine Kacmar</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Joe McCloskey</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Daniel O'Reilly</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Charles Polcaster</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Diana Roscich</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>Somali Tomzak</PersonNm>
        <TitleTxt>Director</TitleTxt>
        <AverageHoursPerWeekRt>5.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <TotalReportableCompFromOrgAmt>0</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>0</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>0</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>0</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <CntrctRcvdGreaterThan100KCnt>0</CntrctRcvdGreaterThan100KCnt>
      <FundraisingAmt>19353</FundraisingAmt>
      <AllOtherContributionsAmt>85468</AllOtherContributionsAmt>
      <TotalContributionsAmt>104821</TotalContributionsAmt>
      <ProgramServiceRevenueGrp>
        <Desc>Nature programs</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>72321</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>72321</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Canoe/snow shoe rental</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>41276</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>41276</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
        <Desc>Permits</Desc>
        <BusinessCd>900099</BusinessCd>
        <TotalRevenueColumnAmt>18420</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>18420</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <TotalProgramServiceRevenueAmt>132017</TotalProgramServiceRevenueAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>6027</TotalRevenueColumnAmt>
        <ExclusionAmt>6027</ExclusionAmt>
      </InvestmentIncomeGrp>
      <GrossRentsGrp>
        <RealAmt>171561</RealAmt>
      </GrossRentsGrp>
      <LessRentalExpensesGrp>
        <RealAmt>0</RealAmt>
      </LessRentalExpensesGrp>
      <RentalIncomeOrLossGrp>
        <RealAmt>171561</RealAmt>
      </RentalIncomeOrLossGrp>
      <NetRentalIncomeOrLossGrp>
        <TotalRevenueColumnAmt>171561</TotalRevenueColumnAmt>
        <ExclusionAmt>171561</ExclusionAmt>
      </NetRentalIncomeOrLossGrp>
      <FundraisingGrossIncomeAmt>6367</FundraisingGrossIncomeAmt>
      <ContriRptFundraisingEventAmt>19353</ContriRptFundraisingEventAmt>
      <FundraisingDirectExpensesAmt>702</FundraisingDirectExpensesAmt>
      <NetIncmFromFundraisingEvtGrp>
        <TotalRevenueColumnAmt>5665</TotalRevenueColumnAmt>
        <ExclusionAmt>5665</ExclusionAmt>
      </NetIncmFromFundraisingEvtGrp>
      <GrossSalesOfInventoryAmt>11297</GrossSalesOfInventoryAmt>
      <CostOfGoodsSoldAmt>7756</CostOfGoodsSoldAmt>
      <NetIncomeOrLossGrp>
        <TotalRevenueColumnAmt>3541</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>3541</RelatedOrExemptFuncIncomeAmt>
      </NetIncomeOrLossGrp>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>423632</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>135558</RelatedOrExemptFuncIncomeAmt>
        <UnrelatedBusinessRevenueAmt>0</UnrelatedBusinessRevenueAmt>
        <ExclusionAmt>183253</ExclusionAmt>
      </TotalRevenueGrp>
      <OtherSalariesAndWagesGrp>
        <TotalAmt>29399</TotalAmt>
        <ProgramServicesAmt>17988</ProgramServicesAmt>
        <ManagementAndGeneralAmt>10660</ManagementAndGeneralAmt>
        <FundraisingAmt>751</FundraisingAmt>
      </OtherSalariesAndWagesGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>12723</TotalAmt>
        <ManagementAndGeneralAmt>12723</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <AdvertisingGrp>
        <TotalAmt>7343</TotalAmt>
        <ProgramServicesAmt>3672</ProgramServicesAmt>
        <ManagementAndGeneralAmt>3671</ManagementAndGeneralAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>221243</TotalAmt>
        <ProgramServicesAmt>176430</ProgramServicesAmt>
        <ManagementAndGeneralAmt>29388</ManagementAndGeneralAmt>
        <FundraisingAmt>15425</FundraisingAmt>
      </OfficeExpensesGrp>
      <ConferencesMeetingsGrp>
        <TotalAmt>7238</TotalAmt>
        <ProgramServicesAmt>2870</ProgramServicesAmt>
        <ManagementAndGeneralAmt>4368</ManagementAndGeneralAmt>
      </ConferencesMeetingsGrp>
      <InsuranceGrp>
        <TotalAmt>2844</TotalAmt>
        <ManagementAndGeneralAmt>2844</ManagementAndGeneralAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>Special Events/Fundrais</Desc>
        <TotalAmt>21017</TotalAmt>
        <FundraisingAmt>21017</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Volunteer recognition</Desc>
        <TotalAmt>4868</TotalAmt>
        <ProgramServicesAmt>2434</ProgramServicesAmt>
        <FundraisingAmt>2434</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>Miscellaneous</Desc>
        <TotalAmt>2150</TotalAmt>
        <ManagementAndGeneralAmt>2150</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>308825</TotalAmt>
        <ProgramServicesAmt>203394</ProgramServicesAmt>
        <ManagementAndGeneralAmt>65804</ManagementAndGeneralAmt>
        <FundraisingAmt>39627</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>193234</BOYAmt>
        <EOYAmt>116598</EOYAmt>
      </CashNonInterestBearingGrp>
      <SavingsAndTempCashInvstGrp>
        <BOYAmt>272433</BOYAmt>
        <EOYAmt>453932</EOYAmt>
      </SavingsAndTempCashInvstGrp>
      <AccountsReceivableGrp>
        <BOYAmt>55283</BOYAmt>
        <EOYAmt>3010</EOYAmt>
      </AccountsReceivableGrp>
      <TotalAssetsGrp>
        <BOYAmt>520950</BOYAmt>
        <EOYAmt>573540</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>11233</BOYAmt>
        <EOYAmt>5757</EOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <DeferredRevenueGrp>
        <BOYAmt>51963</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </DeferredRevenueGrp>
      <OtherLiabilitiesGrp>
        <BOYAmt>22825</BOYAmt>
        <EOYAmt>23050</EOYAmt>
      </OtherLiabilitiesGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>86021</BOYAmt>
        <EOYAmt>28807</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>306141</BOYAmt>
        <EOYAmt>470362</EOYAmt>
      </NoDonorRestrictionNetAssetsGrp>
      <DonorRestrictionNetAssetsGrp>
        <BOYAmt>128788</BOYAmt>
        <EOYAmt>74371</EOYAmt>
      </DonorRestrictionNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>434929</BOYAmt>
        <EOYAmt>544733</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>520950</BOYAmt>
        <EOYAmt>573540</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>114807</ReconcilationRevenueExpnssAmt>
      <DonatedServicesAndUseFcltsAmt>-5003</DonatedServicesAndUseFcltsAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>0</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>64667</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>123835</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>97629</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>86086</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>104821</CurrentTaxYearAmt>
        <TotalAmt>477038</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>64667</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>123835</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>97629</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>86086</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>104821</CurrentTaxYearAmt>
        <TotalAmt>477038</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>3659</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>473379</PublicSupportTotal170Amt>
      <GrossInvestmentIncome170Grp>
        <CurrentTaxYearMinus4YearsAmt>33209</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>96116</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>181180</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>201924</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>177588</CurrentTaxYearAmt>
        <TotalAmt>690017</TotalAmt>
      </GrossInvestmentIncome170Grp>
      <TotalSupportAmt>1167055</TotalSupportAmt>
      <GrossReceiptsRltdActivitiesAmt>628909</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.40560</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.40220</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <CYEndwmtFundGrp>
        <BeginningYearBalanceAmt>63442</BeginningYearBalanceAmt>
        <EndYearBalanceAmt>63442</EndYearBalanceAmt>
      </CYEndwmtFundGrp>
      <CYMinus1YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>80530</BeginningYearBalanceAmt>
        <OtherExpendituresAmt>17088</OtherExpendituresAmt>
        <EndYearBalanceAmt>63442</EndYearBalanceAmt>
      </CYMinus1YrEndwmtFundGrp>
      <CYMinus2YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>80530</BeginningYearBalanceAmt>
        <EndYearBalanceAmt>80530</EndYearBalanceAmt>
      </CYMinus2YrEndwmtFundGrp>
      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>80530</BeginningYearBalanceAmt>
        <EndYearBalanceAmt>80530</EndYearBalanceAmt>
      </CYMinus3YrEndwmtFundGrp>
      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>80530</BeginningYearBalanceAmt>
        <EndYearBalanceAmt>80530</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <EndowmentsHeldUnrelatedOrgInd>0</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>0</EndowmentsHeldRelatedOrgInd>
      <TotalBookValueLandBuildingsAmt>0</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Security deposits</Desc>
        <Amt>23050</Amt>
      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>23050</TotalLiabilityAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>962578</TotalRevEtcAuditedFinclStmtAmt>
      <DonatedServicesAndUseFcltsAmt>538949</DonatedServicesAndUseFcltsAmt>
      <RevenueNotReportedAmt>538949</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>423629</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>423629</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>847774</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>538949</DonatedServicesUseFcltsAmt>
      <ExpensesNotReportedAmt>538949</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>308825</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>308825</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part V, Line 4:</FormAndLineReferenceDesc>
        <ExplanationTxt>To fulfill its mission to inspire passion for environmental stewardship and gardens in a unique urban setting and to promote environmentally sustainable choices through education, outdoor experiences and scientific research, the Board set aside $38,442 for operations and $25,000 for Site Plan.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>FIN 48 Note from Audited Financial Statements: The Organziation was granted an exemption from federal income taxes by the Internal Revenue Service pursuant to the provisions of Internal Revenue Code Section 501(c)(3). The Organization qualifies for the charitable contribution deduction under Section 170(b)(1)(A)(vi) and has been classified as an organization that is not a private foundation under Section 509(a)(1). The tax-exempt purpose of the Organization and the nature in which it operates is described above. The Organization continues to operate in compliance with its tax-exempt purpose. The Organization's annual information and income tax returns filed with the federal and state governments are subject to examination for three years after they are filed.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>The Form 990 was prepared by an independent accountant. It was reviewed by the Lake Katherine staff and approved by the Board Treasurer. The Form 990 provided to the entire Board prior to filing.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The Board of Directors is required to sign the conflict of interest policy annually.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>Governing documents are available upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part I, #5</FormAndLineReferenceDesc>
        <ExplanationTxt>Number of Employees: Thirty-eight individuals (four full-time) worked at Lake Katherine during 2022. Salaries are paid and 2022 W-2s were issued by the City of Palos Heights and a portion of those services were donated to the organization.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>