| Wood River Land Trust CompanyHailey | Form 990 | $7,307,675FY2025 |
| Idaho Botanical Gardens IncBoise | Form 990 | $5,533,992FY2025 |
| Teton Regional Land TrustDriggs | Form 990 | $4,489,283FY2025 |
| Idaho BasecampKetchum | Form 990 | $2,674,921FY2025 |
| Wildland Firefighter FoundationBoise | Form 990 | $2,669,459FY2025 |
| Friends of the Teton River IncDriggs | Form 990 | $2,518,004FY2025 |
| Advocates for the West IncBoise | Form 990 | $2,485,360FY2025 |
| Western Watersheds Project IncHailey | Form 990 | $2,073,382FY2025 |
| Palouse Clearwater Environmental Institute IncorporatedMoscow | Form 990 | $1,883,436FY2024 |
| Foresight Conservation IncHailey | Form 990 | $1,704,938FY2025 |
| Kaniksu Land Trust IncSandpoint | Form 990 | $1,220,150FY2024 |
| Selway-Bitterroot FoundationBoise | Form 990 | $1,135,063FY2025 |
| Blueribbon Coalition IncPocatello | Form 990 | $1,009,223FY2024 |
| Project Big Wood a Nonprofit CorporationKetchum | Form 990 | $884,641FY2025 |
| Sagebrush Steppe Land Trust IncPocatello | Form 990 | $812,492FY2025 |
| High Country Resource Conservation and Development Area IncSaint Anthony | Form 990 | $668,222FY2025 |
| The Earthfire InstituteDriggs | Form 990 | $632,234FY2024 |
| Palouse Land Trust IncMoscow | Form 990 | $615,004FY2025 |
| Snake River Waterkeeper IncBoise | Form 990 | $581,554FY2025 |
| Teton Valley Trails & Pathways IncorporatedDriggs | Form 990 | $557,459FY2025 |
| Idaho Rivers United IncBoise | Form 990 | $552,117FY2024 |
| Sawtooth Society IncHailey | Form 990 | $520,826FY2024 |
| Salmon Valley StewardshipSalmon | Form 990 | $504,834FY2024 |
| Building Material Thrift StoreBellevue | Form 990 | $482,808FY2024 |
| Friends of Weiser River Trail IncBoise | Form 990 | $480,809FY2025 |
| Lower Boise Watershed Council IncNampa | Form 990 | $454,607FY2025 |
| Bear Lake WatchSaint Charles | Form 990 | $437,857FY2024 |
| Land Trust of the Treasure ValleyBoise | Form 990 | $398,336FY2024 |
| Ecosystem Sciences FoundationBoise | Form 990 | $388,503FY2025 |
| Sawtooth Botanical Garden IncKetchum | Form 990 | $370,774FY2024 |
| Idaho Association of Soil Conservation Districts IncBoise | Form 990 | $302,251FY2025 |
| Terragraphics International Foundation IncMoscow | Form 990 | $293,626FY2024 |
| Friends of Deer Flat Wildlife RefugeNampa | Form 990 | $291,108FY2025 |
| Valley Advocates for Responsible Development IncDriggs | Form 990 | $290,912FY2025 |
| Southwest Idaho Resource Conservation & Development RC&D CoMeridian | Form 990 | $255,877FY2024 |
| Friends of Scotchman Peaks Wilderness IncSandpoint | Form 990 | $242,154FY2025 |
| Model Forest Policy Program IncSagle | Form 990 | $230,995FY2024 |
| Trans Cascadia IncDalton Gardens | Form 990 | $229,395FY2024 |
| Idaho Organization of Resource Councils IncBoise | Form 990 | $228,317FY2024 |
| Harris Ranch Wildlife Mitigation Association IncBoise | Form 990 | $209,655FY2025 |
| Wildlens IncBoise | Form 990-EZ | $191,058FY2025 |
| Patagonian Land Conservation Trust IncBoise | Form 990-EZ | $185,179FY2024 |
| Idaho Foundation for Parks and LandsBoise | Form 990 | $173,840FY2025 |
| Lemhi Regional Land TrustSalmon | Form 990 | $171,001FY2025 |
| Friends of the Clearwater IncMoscow | Form 990-EZ | $155,887FY2024 |
| Full Circle Education IncorporatedVictor | Form 990-EZ | $153,882FY2025 |
| Portneuf Greenway Foundation IncPocatello | Form 990-EZ | $151,919FY2024 |
| Idaho Coalition of Land TrustsBoise | Form 990-EZ | $148,671FY2025 |
| Idaho Solid Waste Association IncBoise | Form 990-EZ | $136,545FY2025 |
| Treasure Valley Clean Cities Coalition IncBoise | Form 990-EZ | $126,707FY2025 |