Treeline Foundation
Invitation OnlySeattle, Washington · EIN 46-2216403 · Private foundation
Grants paid (2024)$1.1M
Organizations funded44
Typical grant$20,000
Total assets$750K
Half of its grants to organizations were between $10,000 and $25,000.
From the return
How to apply
On its return for tax year 2024 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
31% of grants went outside Washington.
Grants paid in tax year 2024
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| YMCA of Greater Seattle | Seattle, WA | To provide general operating support and support of the social impact center | $110,000 |
| Sightline Institute | Seattle, WA | To support efforts to address climate change | $100,000 |
| Washington Trails Association | Seattle, WA | General operating support, with special interest in olt program | $100,000 |
| 350Org | Boston, MA | To provide general operating support | $75,000 |
| The Sierra Club Foundation | Oakland, CA | To support of the outdoors for all program | $75,000 |
| Northwest Abortion Access Fund | Portland, OR | To provide general operating support | $65,000 |
| Forterra | Seattle, WA | To provide general operating support | $50,000 |
| Benefits Law Center | Seattle, WA | To provide general operating support | $25,000 |
| Earthgen | Seattle, WA | To provide general operating support | $25,000 |
| Fresh Tracks | Washington, DC | To provide general operating support | $25,000 |
| Seattle Shakespeare Company | Seattle, WA | To provide general operating support | $25,000 |
| The Trust for Public Land | Los Angeles, CA | General operating support in tpl's seattle region | $25,000 |
| Zeno | Seattle, WA | To provide general operating support | $25,000 |
| Casa Latina | Seattle, WA | To provide general operating support | $20,000 |
| Desc | Seattle, WA | To provide general operating support | $20,000 |
| Islandwood | Bainbridge Island, WA | To provide general operating support | $20,000 |
| Mary's Place | Seattle, WA | To provide general operating support | $20,000 |
| Pacific Science Center | Seattle, WA | To provide general operating support | $20,000 |
| Plymouth Housing Group | Seattle, WA | To provide general operating support | $20,000 |
| Solid Ground | Seattle, WA | To provide general operating support | $20,000 |
| Youthcare | Seattle, WA | To provide general operating support | $20,000 |
| YWCA Seattle King Snohomish | Seattle, WA | To support of women experiencing homelessness | $20,000 |
| National Audubon Society | New York, NY | To support of audubon washingtons seward park center | $20,000 |
| American Alpine Club | Golden, CO | General operating support, with special interest in reaching younger and more diverse climbers | $15,000 |
| The Vera Project | Seattle, WA | To provide general operating support | $15,000 |
| A Contemporary Theatre | Seattle, WA | To provide general operating support | $10,000 |
| Crisis Text Line | New York, NY | To provide general operating support | $10,000 |
| Define American | Los Angeles, CA | To provide general operating support | $10,000 |
| Northwest Choirs | Seattle, WA | To provide general operating support | $10,000 |
| Northwest Film Forum | Seattle, WA | To support the ultimate citizens video | $10,000 |
| Northwest Outward Bound | Portland, OR | To providing general operating support of programming in mazama, wa | $10,000 |
| Rainier Valley Corps | Seattle, WA | To support the ageup program | $10,000 |
| Sawhorse Revolution | Seattle, WA | To provide general operating support | $10,000 |
| Seattle Girls School | Seattle, WA | To provide general operating support | $10,000 |
| Seattle Repertory Theatre | Seattle, WA | To support of the public works program | $10,000 |
| Seattle Symphony | Seattle, WA | To provide general operating support | $10,000 |
| The 5 Gyres Institute | Santa Monica, CA | To provide general operating support | $10,000 |
| The Mountaineers | Seattle, WA | To support the mountain workshops program | $10,000 |
| The Mountains to Sound Greenway Trust | Seattle, WA | To provide general operating support | $10,000 |
| Totem Star | Seattle, WA | To provide general operating support | $10,000 |
| Birds Connect Seattle | Seattle, WA | To support of youth educational programming | $10,000 |
| Catawba College | Salisbury, NC | In support of gals program | $3,333 |
| University of Arizona | Tucson, AZ | In support of gals program | $3,333 |
| New Mexico State University | Las Cruces, NM | To provide general operating support | $3,333 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2024 | $1,124,999 | 44 |
| 2023 | $1,206,999 | 45 |
Sources
- IRS Form 990-PF, tax year 2024, filed Nov 5, 2025 - IRS e-file batch, object ID 202503099349100735
- IRS Tax Exempt Organization Search for EIN 46-2216403
- Profile updated Nov 5, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.