Nonprofit · EIN 99-4480469
OPEN SPACE TRAILS ALLIANCE
Also known as MOUNT DIABLO TRAILS ALLIANCE
Tax-exempt · DIABLO, CA 94528
Address and contacts
- Address (IRS master file)
- PO BOX 812, DIABLO, CA 94528-0812
- In care of
- % MARK MOSKOWITZ
- Mailing address (990-N for 2025)
- PO Box 812, Diablo CA 94528
- Principal officer (990-N for 2025)
- Mark Moskowitz, 367 Bryan Dr, Alamo CA 94507
What it must file and when
IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. Its accounting year ends in December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990-N on file |
| 2024 | December 31, 2024 | May 15, 2025 | No data |
| 2023 | December 31, 2023 | May 15, 2024 | No data |
IRS record
- EIN
- 99-4480469
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 2024
- Accounting year ends
- December
- Files
- Form 990-N (e-Postcard)
- Category (NTEE)
- Environment (C30)
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-N for 2025 Officer: Mark Moskowitz | December 31, 2025 | ≤ $50,000 receipts | – | – | e-Postcard |
990-N: the IRS publishes only the latest e-Postcard per organization; earlier years appear here as 990.tax collects the monthly files. 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.
Questions about OPEN SPACE TRAILS ALLIANCE
- What is the EIN of OPEN SPACE TRAILS ALLIANCE?
- The employer identification number (EIN) of OPEN SPACE TRAILS ALLIANCE is 99-4480469.
- Is OPEN SPACE TRAILS ALLIANCE tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2024.
- Are donations to OPEN SPACE TRAILS ALLIANCE tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does OPEN SPACE TRAILS ALLIANCE file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of OPEN SPACE TRAILS ALLIANCE due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did OPEN SPACE TRAILS ALLIANCE last file with the IRS?
- The latest return in the IRS public files is the 990-N for 2025 for the year ended December 31, 2025.
- Who is the principal officer of OPEN SPACE TRAILS ALLIANCE?
- The 990-N for 2025 names Mark Moskowitz.
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