The Endurance Fund
Historical FunderNicasio, California · EIN 94-3170349 · Private foundation
Half of its grants to organizations were between $500 and $7,100.
How to apply
The foundation filed the following application information (Form 990-PF Part XV, tax year 2024):
| Contact | Robert G Schiro |
|---|---|
| Address | 1749 Nicasio Valley Road, Nicasio CA 94946 |
| Phone | 4154884311 |
| Form and materials | The Foundation does not have an application form, but requires details of the purpose of the grant and verification of the tax-exempt status of donees. |
| Deadlines | There are no submission deadlines |
| Restrictions | There are no restrictions or limitations on awards such as by geographical areas, charitable fields, kinds of institutions or other factors. |
Copied as filed. Deadlines on a tax return describe the foundation's usual process; they are not confirmation of a current open cycle.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
30% of grants went outside California.
Grants paid in tax year 2024
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Marin Community Foundation | Novato, CA | The Reliance Fund | $3,335,743 |
| Vanguard Charitable Program | Warwick, RI | General Support | $2,631,590 |
| Vanguard Charitable Program | Southeastern, PA | The Granite Fund | $50,000 |
| Vanguard Charitable Program | Warwick, RI | The Meili Fund | $50,000 |
| San Geronimo Valley Community Cente | San Geronimo, CA | Council Dinner | $26,091 |
| Vanguard Charitable Program | Warwick, RI | Facilitation of grant making | $25,000 |
| San Geronimo Valley Community Cente | San Geronimo, CA | Job Training | $18,900 |
| San Geronimo Valley Community Cente | San Geronimo, CA | Job Training | $16,100 |
| Kingswood-Oxford School | West Harest Hartford, CT | Annual Fund | $10,000 |
| San Geronimo Valley Community Cente | San Geronimo, CA | Vast | $7,100 |
| San Geronimo Valley Community Cente | San Geronimo, CA | Vast | $6,225 |
| LEAP Lagunitas School Savers | San Geronimo, CA | General Support | $5,000 |
| Marin Agricultural Land Trust | Point Reyes Station, CA | General Support - Stewardship | $5,000 |
| San Geronimo Valley Emergency Fund | San Geronimo, CA | General Support | $5,000 |
| Marin Country Day School | Corte Madera, CA | Annual Fund | $5,000 |
| Branson School | Ross, CA | Annual Fund | $5,000 |
| Pomona College | Claremont, CA | Annual Fund | $5,000 |
| San Geronimo Valley Community Cente | San Geronimo, CA | Endowment Fund | $4,000 |
| Osher Marin Jewish Community Center | San Rafael, CA | General Support | $2,000 |
| St Helena Endowment Trust | St Helena, CA | General Support | $1,550 |
| Dominican University of California | San Rafael, CA | Athletics Program | $1,500 |
| St Helena Endowment Trust | St Helena, CA | General Support | $1,500 |
| Friends of the Library Fairfax | San Rafael, CA | General Support | $1,039 |
| West Marin Senior Services | Point Reyes Station, CA | General Support | $1,000 |
| Mountain Play Association | San Rafael, CA | General Support | $1,000 |
| Nicasio Volunteer Fire Dept | Nicasio, CA | General Support | $500 |
| National Parks Conservation Associa | Washington, DC | General Support | $500 |
| Pacific Forest Trust | San Francisco, CA | General Support & Watershed Project | $500 |
| San Geronimo Valley Community Cente | San Geronimo, CA | Woodacre Park | $500 |
| Marin Symphony | San Rafael, CA | General Support | $500 |
| Nicasio Historical Society | Nicasio, CA | General Support | $200 |
| Berkshire Theatre Group | Pittsfield, MA | General Support | $100 |
| Maine Rockweed Coalition | Pembroke, ME | Rockweed Forest Book | $100 |
| Signal Foundation | Harrison, NY | General Support | $50 |
| Signal Foundation | Harrison, NY | General Support | $50 |
| Signal Foundation | Harrison, NY | General Support | $20 |
The return also lists 13 grants to individuals ($18,970). We do not publish the names of individual recipients.
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2024 | $6,242,328 | 49 |
| 2023 | $260,266 | 31 |
Sources
- IRS Form 990-PF, tax year 2024, filed Feb 26, 2025 - IRS e-file batch, object ID 202500579349100510
- IRS Tax Exempt Organization Search for EIN 94-3170349
- 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.