GRAND TETON NATIONAL PARK FOUNDATION

Financials

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended September 30, 2025, highest compensation first.

Address and contacts

Address (IRS master file)

PO BOX 249, MOOSE, WY 83012-0249

In care of

% MARY PATNO

Principal officer (990 for 2024)

LESLIE MATTSON, PO Box 249, Moose, WY 83012

Signed the 990

LESLIE MATTSON, President

Phone

(307) 732-0629

Website

WWW.GTNPF.ORG

Return prepared by

Jones Simkins LLC

Mission

Grand Teton National Park Foundation (the Foundation) is a private, nonprofit organization whose mission is to partner with Grand Teton National Park to steward, protect, and enhance all that is special in the park. Budget limitations, combined with increasing visitation, led the National Park Service to create partnerships with organizations like the Foundation to raise private money for special park needs. The Foundation initiates improvements, critical research, and projects that improve visitors experiences, creating a solid future for Grand Teton. Since 1997, the organization has raised funds for efforts that connect youth to nature, preserve cultural resources, protect wildlife and natural resources, and enhance visitor experiences. In addition, the Foundation has completed capital projects such as construction of the Craig Thomas Discovery and Visitor Center, the conservation of 1,280 acres of critical wildlife habitat that was formerly owned by the state of Wyoming, the renewal

Program accomplishments

• State Lands/Kelly Parcel:In 2025, the Foundation supported the park in its decades-long effort to purchase the 640-acre Kelly parcel from the state of Wyoming. The Kelly parcel was the largest tract of unprotected land remaining within the boundaries of Grand Teton National Park. The elevated square-mile provides sweeping views of the Teton Range and includes critical habitat for numerous species of wildlife. The parcel is also located within a key migration corridor for pronghorn, elk, and mule deer. If the Kelly parcel was not permanently conserved as part of Grand Teton National Park, this inholding could have been developed, risking the loss of vital habitat in the Greater Yellowstone Ecosystemone of the last remaining, nearly intact temperate ecosystems on the planet. The permanent conservation of the Kelly parcel was a major conservation achievement for Grand Teton National Park and the Foundation in 2025.
  Expenses $38,489,192 · grants $37,728,731
• WINTER AND SUMMER TRAILS:The Foundation funds grooming three times per week of the 14-mile stretch of road between Taggart Lake Trailhead and Signal Mountain on the Teton Park Road. Regular grooming allows visitors to easily explore on Nordic skis, snowshoes, or foot to experience this special season in Grand Teton National Park. In the summer months, the Foundation is funding a multi-year effort to renew key destinations along the Teton Crest Traila 45-mile route through the parks high country that was originally constructed by the Civilian Conservation Corps in the 1930s. Summer 2025 marked the sixth year of project work on the Crest Trail. Improvements were completed near Marion Lake and Fox Creek Pass, making it more safe for hikers to this remote alpine area.
  Expenses $5,985,292 · grants $5,825,196
• MORMON ROW PRESERVATION: In partnership with Grand Teton, the Foundation has undertaken a multi-year project to renew the Mormon Row Historic Districtthe parks most popular cultural destinationwith the goals of preserving remaining structures and providing visitors with meaningful opportunities to connect with park history. This effort is, for the first time, holistically addressing preservation needs in the district and improving the ways visitors learn about and experience the remarkable legacy of these buildingsbringing the history of this place to life. Work continued in 2025 and focused on the Roy Chambers Homestead, which will be adaptively reused for employee housing. New siding and interior work was completed, and the structures will be available for seasonal workforce housing next summer. In 2026, the park will begin on-the-ground visitor experience improvements including modern interpretation, renewed wayfinding, and additional parking.
  Expenses $1,155,744 · grants $1,079,397
• WILDLIFE AND NATURAL RESOURCE CONSERVATION: Environmental shifts, invasive species, land use and development patterns, and changing visitation all threaten to disrupt the sensitive ecological relationships that characterize Grand Teton today. Projects supported by the Foundations wildlife and natural resources initiative make significant strides toward ensuring the long-term ecological integrity of Grand Teton National Park and the Greater Yellowstone Ecosystem. In 2025, the Foundation funded efforts focused on gray wolf ecology, ungulate monitoring, climate change impacts, sagebrush/grassland habitat restoration, bear-resistant food storage lockers, and more.
  Expenses $639,899 · grants $629,522
• YOUTH ENGAGEMENTA priority for Grand Teton National Park is to engage future park stewards by providing an introduction to the outdoors, conservation, and careers through in-depth programs. Three impactful efforts funded through the Foundations youth initiative introduce Grand Teton to a younger audience and offer educational and employment opportunities that keep participants actively involved in the outdoors as they begin to make career decisions:Youth Conservation Program employs 16 to 19-year-olds on Grand Tetons trail crew, accomplishing much-needed work while participants learn about park resources and develop conservation ethics. Tribal Youth Engagement provides hands-on opportunities for regional Native American youth to connect with nature and cultural history through week and month-long programs in Grand Teton.National Service Learning Corps offers ongoing career development and mentoring to young professionals who lead outdoor youth programming in their home cities.
  Expenses $467,768 · grants $324,325
• Reimagining Taggart LakeThe Foundation and Grand Teton National Park are working together to reimagine one of the parks cherished destinationsTaggart Lake. As the parks most frequently visited year-round trailhead, Taggart welcomes more than 300,000 people annually. Its popularity speaks to the magic of the place, but it also underscores the need for thoughtful renewal. Today, aging facilities, strained trails, and crowding place pressure on both visitors and the landscape. The Reimagining Taggart Lake project is reshaping this beloved destination so it remains welcoming, accessible, and ecologically resilient for generations. The projects guiding goals are:Create a smoother, safer, and more intuitive arrival.Protect riparian and lakeshore resources.Improve accessibility so people of all abilities can experience this landscape.Build a trail system that eases congestion and encourages sustainable use year-round.Restore degraded areas and safeguard the natural beauty that draws visitors here in the first place.2025 marked a year of meaningful progress. This year, early design concepts evolved into detailed construction documents while initial on-the-ground work began with the completion of the new bridge across Taggart Creek and the burial of overhead power lines near the trailhead. Work will continue next year with continued backcountry trail improvements and the start of trailhead renewal.
  Expenses $301,121 · grants $293,318
• SNAKE RIVER GATEWAYS:Grand Teton National Park Foundation, in partnership with Grand Teton National Park, completed work at the third and final site to be improved as part of our multi-year campaign to address inadequate facilities and resource degradation at three popular access points on the Snake River. The Snake River Gateways campaign is enhancing visitors' experiences at Jackson Lake Dam, Pacific Creek, and Moose Landing. Project work continued at Moose Landing in April 2025. The goal at each site is to blend access, education, safety, and sustainability to create a sense of arrival that encourages visitors to engage with the river as a spectacular and essential natural resource. Priorities support significant improvements adapted to the needs of visitors, river conditions, and surrounding terrain that include: functional improvements to support visitors and recreationists of all abilities; restoration and resilience of shoreline habitats; and educational elements to inspire mindful discovery and stewardship.
  Expenses $288,706 · grants $236,591
• Ranger Support:The high peaks, mountain canyons, and glacial lakes of Grand Teton National Park draw recreationists from around the world who are eager to explore this iconic landscape. The Jenny Lake Rangers are the parks team of search and rescue professionals who provide a wide range of assistance to visitors in need. From injured climbers on the Grand Teton to hikers with sprained ankles only a few miles from the trailhead, the Jenny Lake Rangers are always ready to respond. Grand Teton National Park Foundation has provided private philanthropic support for this team since 2018. The main focus areas to advance ranger excellence in Grand Teton are to:Provide the highest quality training on a regular and recurring basis with an emphasis on search and rescueEnhance the park's ability to procure and replace specialized equipment, including personal protective equipment, and technology as it becomes availableProvide public outreach and education through programs and communication mediums to promote safety and prevent accidentsImprove facilities that support ranger operations and provide mental health support to all of Grand Tetons first responders
  Expenses $100,911 · grants $99,179

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in September, so each return is due on the 15th day of the 5th month after that.

IRS record

EIN

83-0322668

Tax-exempt status

501(c)(3): Charitable, religious, educational or scientific organization

Foundation status

Publicly supported organization (170(b)(1)(A)(vi))

Donations deductible (Pub 78)

Public charity, 50% deduction limit

Exempt since

1998

Accounting year ends

September

Files

Form 990 or 990-EZ

Category (NTEE)

Philanthropy, voluntarism and grantmaking foundations (T30)

Assets (IRS master file)

$26,316,519

Income (IRS master file)

$85,180,673

Filing history

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 83-0322668).

Questions about GRAND TETON NATIONAL PARK FOUNDATION

What is the EIN of GRAND TETON NATIONAL PARK FOUNDATION?

The employer identification number (EIN) of GRAND TETON NATIONAL PARK FOUNDATION is 83-0322668.

Is GRAND TETON NATIONAL PARK FOUNDATION tax-exempt?

Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1998.

Are donations to GRAND TETON NATIONAL PARK FOUNDATION tax-deductible?

Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).

Which annual return does GRAND TETON NATIONAL PARK FOUNDATION file?

Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.

When is the next return of GRAND TETON NATIONAL PARK FOUNDATION due?

The return for tax year 2025 (the year ending September 30, 2026) is due February 16, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.

When did GRAND TETON NATIONAL PARK FOUNDATION last file with the IRS?

The latest return in the IRS public files is the 990 for the year ended September 2025.

Who is the principal officer of GRAND TETON NATIONAL PARK FOUNDATION?

The 990 for the year ended September 30, 2025 names LESLIE MATTSON.

Who are the officers and directors of GRAND TETON NATIONAL PARK FOUNDATION?

The 990 for the year ended September 30, 2025 lists 31 people; 6 received compensation from the organization, the highest $577,119 (LESLIE MATTSON, President).

How much revenue does GRAND TETON NATIONAL PARK FOUNDATION have?

On its 990 for the year ended September 30, 2025 it reported revenue of $24,510,153, expenses of $50,113,571 and total assets of $26,316,519 at year end.

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