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Private foundations don’t post open calls, so nobody can search them. We read IRS filings instead — 9.6 million grants from 174,053 foundations and grantmaking charities, searchable by what the money was actually for.

12 funders with a record of paying for “greenways”

Where the money went

1.0×
Great Rivers Greenway Foundation → Metropolitan Park and Recreation District (Great Rivers Greenway District): $7.1M across 3 grants, latest 2024The Ralph C Wilson Jr Foundation → Community Foundation for Southeast Michigan: $5.0M across 1 grant, latest 2023The William Penn Foundation → Fund for Philadelphia Inc: $3.1M across 2 grants, latest 2022Walton Family Foundation Inc → City of Springdale: $3.1M across 2 grants, latest 2023John S and James L Knight Foundation → Community Foundation for Southeast Michigan: $1.5M across 3 grants, latest 2024The Nature Conservancy → Friends of Verde River Greenway: $1.5M across 5 grants, latest 2024Seattle Foundation → Mountains to Sound Greenway Trust: $630K across 18 grants, latest 2024Barr Foundation → (243) Mystic River Watershed Association Inc: $563K across 1 grant, latest 2023The Powell Foundation → Waterloo Greenway Conservancy: $381K across 15 grants, latest 2025Hatch Foundation → Ozark Greenways: $136K across 3 grants, latest 2024National Fish and Wildlife Foundation → Siskiyou Gardens Parks and Greenways: $103K across 1 grant, latest 2021North Central Pa Regional Planning & → Tuna Valley Trail Association: $50K across 3 grants, latest 2024The Ralph C Wilson Jr Foundation → Michigan Trails & Greenways Alliance: $1.6M across 1 grant, latest 2024Walton Family Foundation Inc → City of Bentonville: $1.2M across 3 grants, latest 2023John S and James L Knight Foundation → Detroit Riverfront Conservancy: $1.0M across 2 grants, latest 2023The William Penn Foundation → Schuylkill River Greenway Association: $973K across 4 grants, latest 2024Barr Foundation → (230) the Lawrence and Lillian Solomon Foundation Inc: $500K across 1 grant, latest 2022Seattle Foundation → Seattle Neighborhood Greenways: $120K across 11 grants, latest 2024Hatch Foundation → Ozark Greenways: $114K across 3 grants, latest 2023National Fish and Wildlife Foundation → Mountains to Sound Greenway Trust: $85K across 3 grants, latest 2023The Nature Conservancy → The Greenway Foundation: $46K across 5 grants, latest 2024North Central Pa Regional Planning & → Kinzua Valley Trail Club: $38K across 2 grants, latest 2024The Ralph C Wilson Jr Foundation → Detroit Economic Growth Association: $1.5M across 1 grant, latest 2022Walton Family Foundation Inc → Northwest Arkansas Regional Planning Commission: $800K across 1 grant, latest 2024The William Penn Foundation → Riverfront North Partnership: $670K across 4 grants, latest 2024Barr Foundation → (746) Mystic River Watershed Association Inc: $450K across 1 grant, latest 2022John S and James L Knight Foundation → Town Square Neighborhood Development Corporation (Aka Tsndc): $400K across 2 grants, latest 2023Hatch Foundation → Ozarks Greenways: $49K across 3 grants, latest 2022National Fish and Wildlife Foundation → Friends of Verde River Greenway: $48K across 1 grant, latest 2022North Central Pa Regional Planning & → Headwaters Charitable Trust: $25K across 1 grant, latest 2022The Nature Conservancy → Moose Mountains Regional Greenways: $20K across 1 grant, latest 2022The Ralph C Wilson Jr Foundation → Friends of the Detroit River: $1.0M across 1 grant, latest 2024The William Penn Foundation → Heritage Conservancy: $600K across 4 grants, latest 2024Walton Family Foundation Inc → City of Bella Vista: $585K across 1 grant, latest 2022The Ralph C Wilson Jr Foundation → Friends of the Detroit River: $531K across 1 grant, latest 2022The William Penn Foundation → Philadelphia City Fund: $525K across 1 grant, latest 2023Barr Foundation → (286) the Lawrence and Lillian Solomon Foundation Inc: $400K across 1 grant, latest 2023Barr Foundation → (781) the Lawrence and Lillian Solomon Foundation Inc: $400K across 1 grant, latest 2024Barr Foundation → (538) Mystic River Watershed Association Inc: $390K across 1 grant, latest 2024Barr Foundation → (537) Mystic River Watershed Association Inc: $390K across 1 grant, latest 2024Walton Family Foundation Inc → Northwest Arkansas Razorback Greenway Alliance: $376K across 2 grants, latest 2023Barr Foundation → (699) Rose Fitzgerald Kennedy Greenway Conservancy Inc: $360K across 1 grant, latest 2024The William Penn Foundation → East Coast Greenway Alliance Inc: $350K across 4 grants, latest 2024The William Penn Foundation → D&r Greenway Land Trust Inc: $330K across 3 grants, latest 2023Barr Foundation → (73) Rose Fitzgerald Kennedy Greenway Conservancy Inc: $320K across 1 grant, latest 2022The Ralph C Wilson Jr Foundation → The Nature Conservancy: $300K across 1 grant, latest 2022Barr Foundation → (700) Rose Fitzgerald Kennedy Greenway Conservancy Inc: $280K across 1 grant, latest 2024Walton Family Foundation Inc → City of Lowell: $250K across 1 grant, latest 2023The Ralph C Wilson Jr Foundation → Parks & Trails New York: $225K across 2 grants, latest 2023Barr Foundation → (100) Rose Fitzgerald Kennedy Greenway Conservancy Inc: $200K across 1 grant, latest 2023The William Penn Foundation → Delaware Greenways Inc: $135K across 3 grants, latest 2023Barr Foundation → (833) Mystic River Watershed Association Inc: $100K across 1 grant, latest 2023The Ralph C Wilson Jr Foundation → Green Options Buffalo: $100K across 1 grant, latest 2022Barr Foundation → (539) Mystic River Watershed Association Inc: $100K across 1 grant, latest 2024Barr Foundation → (747) Mystic River Watershed Association Inc: $100K across 1 grant, latest 2022The William Penn Foundation → New Jersey Conservation Foundation: $75K across 1 grant, latest 2024Barr Foundation → (541) Mystic River Watershed Association Inc: $60K across 1 grant, latest 2024Barr Foundation → (540) Mystic River Watershed Association Inc: $60K across 1 grant, latest 2024The Ralph C Wilson Jr Foundation → Detroit Riverfront Conservancy: $50K across 2 grants, latest 2023National Fish and Wildlife Foundation → Wolf River Conservancy: $41K across 2 grants, latest 2022National Fish and Wildlife Foundation → Wolf River Conservancy Inc: $38K across 1 grant, latest 2023National Fish and Wildlife Foundation → Sand Creek Regional Greenway Partnership: $29K across 1 grant, latest 2023North Central Pa Regional Planning & → City of St Marys: $23K across 1 grant, latest 2024The Nature Conservancy → Bear-Paw Regional Greenway: $19K across 2 grants, latest 2023The Ralph C Wilson Jr Foundation: $10M on this topic. Open the funder.The Ralph C Wilson Jr Foundat…$10MGreat Rivers Greenway Foundation: $7.1M on this topic. Open the funder.Great Rivers Greenway Foundat…$7.1MThe William Penn Foundation: $6.8M on this topic. Open the funder.The William Penn Foundation$6.8MWalton Family Foundation Inc: $6.3M on this topic. Open the funder.Walton Family Foundation Inc$6.3MBarr Foundation: $4.7M on this topic. Open the funder.Barr Foundation$4.7MJohn S and James L Knight Foundation: $2.9M on this topic. Open the funder.John S and James L Knight Fou…$2.9MThe Nature Conservancy: $1.6M on this topic. Open the funder.The Nature Conservancy$1.6MSeattle Foundation: $750K on this topic. Open the funder.Seattle Foundation$750KThe Powell Foundation: $381K on this topic. Open the funder.The Powell Foundation$381KNational Fish and Wildlife Foundation: $343K on this topic. Open the funder.National Fish and Wildlife Fo…$343KHatch Foundation: $300K on this topic. Open the funder.Hatch Foundation$300KNorth Central Pa Regional Planning &: $136K on this topic. Open the funder.North Central Pa Regional Pla…$136KMetropolitan Park and Recreation District (Great Rivers Greenway District): received $7.1M on this topicMetropolitan Park and Recreatio…$7.1MCommunity Foundation for Southeast Michigan: received $6.5M on this topicCommunity Foundation for Southe…$6.5MFund for Philadelphia Inc: received $3.1M on this topicFund for Philadelphia Inc$3.1MCity of Springdale: received $3.1M on this topicCity of Springdale$3.1MMichigan Trails & Greenways Alliance: received $1.6M on this topicMichigan Trails & Greenways All…$1.6MFriends of Verde River Greenway: received $1.5M on this topicFriends of Verde River Greenway$1.5MDetroit Economic Growth Association: received $1.5M on this topicDetroit Economic Growth Associa…$1.5MCity of Bentonville: received $1.2M on this topicCity of Bentonville$1.2MDetroit Riverfront Conservancy: received $1.1M on this topicDetroit Riverfront Conservancy$1.1MFriends of the Detroit River: received $1.0M on this topicFriends of the Detroit River$1.0MSchuylkill River Greenway Association: received $973K on this topicSchuylkill River Greenway Assoc…$973KNorthwest Arkansas Regional Planning Commission: received $800K on this topicNorthwest Arkansas Regional Pla…$800KMountains to Sound Greenway Trust: received $716K on this topicMountains to Sound Greenway Tru…$716KRiverfront North Partnership: received $670K on this topicRiverfront North Partnership$670KHeritage Conservancy: received $600K on this topicHeritage Conservancy$600KCity of Bella Vista: received $585K on this topicCity of Bella Vista$585K(243) Mystic River Watershed Association Inc: received $563K on this topic(243) Mystic River Watershed As…$563KFriends of the Detroit River: received $531K on this topicFriends of the Detroit River$531KPhiladelphia City Fund: received $525K on this topicPhiladelphia City Fund$525K(230) the Lawrence and Lillian Solomon Foundation Inc: received $500K on this topic(230) the Lawrence and Lillian…$500K(746) Mystic River Watershed Association Inc: received $450K on this topic(746) Mystic River Watershed As…$450KTown Square Neighborhood Development Corporation (Aka Tsndc): received $400K on this topicTown Square Neighborhood Develo…$400K(286) the Lawrence and Lillian Solomon Foundation Inc: received $400K on this topic(286) the Lawrence and Lillian…$400K(781) the Lawrence and Lillian Solomon Foundation Inc: received $400K on this topic(781) the Lawrence and Lillian…$400K(538) Mystic River Watershed Association Inc: received $390K on this topic(538) Mystic River Watershed As…$390K(537) Mystic River Watershed Association Inc: received $390K on this topic(537) Mystic River Watershed As…$390KWaterloo Greenway Conservancy: received $381K on this topicWaterloo Greenway Conservancy$381KNorthwest Arkansas Razorback Greenway Alliance: received $376K on this topicNorthwest Arkansas Razorback Gr…$376K(699) Rose Fitzgerald Kennedy Greenway Conservancy Inc: received $360K on this topic(699) Rose Fitzgerald Kennedy G…$360KEast Coast Greenway Alliance Inc: received $350K on this topicEast Coast Greenway Alliance Inc$350KD&r Greenway Land Trust Inc: received $330K on this topicD&r Greenway Land Trust Inc$330K(73) Rose Fitzgerald Kennedy Greenway Conservancy Inc: received $320K on this topic(73) Rose Fitzgerald Kennedy Gr…$320KThe Nature Conservancy: received $300K on this topicThe Nature Conservancy$300K(700) Rose Fitzgerald Kennedy Greenway Conservancy Inc: received $280K on this topic(700) Rose Fitzgerald Kennedy G…$280KCity of Lowell: received $250K on this topicCity of Lowell$250KParks & Trails New York: received $225K on this topicParks & Trails New York$225K(100) Rose Fitzgerald Kennedy Greenway Conservancy Inc: received $200K on this topic(100) Rose Fitzgerald Kennedy G…$200KOzark Greenways: received $136K on this topicOzark Greenways$136KDelaware Greenways Inc: received $135K on this topicDelaware Greenways Inc$135KSeattle Neighborhood Greenways: received $120K on this topicSeattle Neighborhood Greenways$120KOzark Greenways: received $114K on this topicOzark Greenways$114KSiskiyou Gardens Parks and Greenways: received $103K on this topicSiskiyou Gardens Parks and Gree…$103K(833) Mystic River Watershed Association Inc: received $100K on this topic(833) Mystic River Watershed As…$100KGreen Options Buffalo: received $100K on this topicGreen Options Buffalo$100K(539) Mystic River Watershed Association Inc: received $100K on this topic(539) Mystic River Watershed As…$100K(747) Mystic River Watershed Association Inc: received $100K on this topic(747) Mystic River Watershed As…$100KNew Jersey Conservation Foundation: received $75K on this topicNew Jersey Conservation Foundat…$75K(541) Mystic River Watershed Association Inc: received $60K on this topic(541) Mystic River Watershed As…$60K(540) Mystic River Watershed Association Inc: received $60K on this topic(540) Mystic River Watershed As…$60KTuna Valley Trail Association: received $50K on this topicTuna Valley Trail Association$50KOzarks Greenways: received $49K on this topicOzarks Greenways$49KThe Greenway Foundation: received $46K on this topicThe Greenway Foundation$46KWolf River Conservancy: received $41K on this topicWolf River Conservancy$41KKinzua Valley Trail Club: received $38K on this topicKinzua Valley Trail Club$38KWolf River Conservancy Inc: received $38K on this topicWolf River Conservancy Inc$38KSand Creek Regional Greenway Partnership: received $29K on this topicSand Creek Regional Greenway Pa…$29KHeadwaters Charitable Trust: received $25K on this topicHeadwaters Charitable Trust$25KCity of St Marys: received $23K on this topicCity of St Marys$23KMoose Mountains Regional Greenways: received $20K on this topicMoose Mountains Regional Greenw…$20KBear-Paw Regional Greenway: received $19K on this topicBear-Paw Regional Greenway$19K
12 funders, 60 recipients, grants matching “greenways” only. Ribbon width is proportional to the total given; each funder has its own colour (smaller funders in gray). Hover a name to isolate its flows, click a funder to open it. Drag to move around; zoom with the buttons, a double-click, or the wheel after clicking the map.

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Source: IRS Form 990-PF Part XV and Form 990 Schedule I, tax years 2019–2025. These are grants already paid, a record of what an organization funds rather than an open call. Private foundations rarely accept unsolicited applications and the route in is usually a program officer; grantmaking charities and associations more often run real application cycles, so check their website. How this data is built, and its limits →