Mazamas
Donations deductibleMazamas' network
9 peoplei9 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (9). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.The board
9 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 9 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.| Name | Role as filed | Since | On the board |
|---|---|---|---|
| Charles Barker | Director | 2022 | 4 yrs |
| Chris Jaworski | Director | 2022 | 4 yrs |
| Claire Tenscher | Director | 2022 | 4 yrs |
| David Urbaniak | Vice President | 2022 | 4 yrs |
| Debbie Dwelle | Director | 2024 | 2 yrs |
| Greg Scott | President | 2022 | 4 yrs |
| Liz Crowe | Treasurer | 2022 | 4 yrs |
| Martin Hanson | Director | 2023 | 3 yrs |
| Matthew Sundling | Company secretary | 2024 | 2 yrs |
Under 5 years5 to 6 years6 years or more
Officers and senior leadership
5 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.| Name | Title as filed | On the filings |
|---|---|---|
| Kaleen Deatherage | Past Exec Dir | since 2022 |
| Lee Davis | Executive Dir. | since 2018 |
| Mitsu Iwasaki | Former Exec Dir | since 2019 |
| Rebekah Philliips | Executive Dir. | since 2023 |
| Sarah Bradham | Executive Dir. | since 2019 |
Pay and hours
year to 31 December 2024iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.| Name | Title as filed | Hours a week | Pay from the organisation | Related organisations | Other |
|---|---|---|---|---|---|
| Rebekah Philliips | Executive Dir. | 40 | $105k | ||
| Greg Scott | President | 6 | $0 | ||
| David Urbaniak | Vice President | 6 | $0 | ||
| Liz Crowe | Treasurer | 6 | $0 | ||
| Matthew Sundling | Secretary | 6 | $0 | ||
| Charles Barker | Director | 4 | $0 | ||
| Debbie Dwelle | Director | 4 | $0 | ||
| Martin Hanson | Director | 4 | $0 | ||
| Claire Tenscher | Director | 4 | $0 | ||
| Chris Jaworski | Director | 4 | $0 |
About
- Legal name
- Mazamas
- EIN
- 930408077
- Address
- 527 Se 43rd Ave, Portland, OR, 97215-1608
- State
- Oregon
- Mission
- Mazamas promotes moutaineering and wilderness exploration. The organization also collects and disseminates authoritative and scientific information concerning mountains and wilderness, and encourages the preservation of the natural world. (as filed on the Form 990)
- Activity (NTEE)
- C600 Environment
- IRS classification
- 501(c)03 (tax-exempt under section 501(c)(3) where shown)
- Classified purpose
- Environment
- Size band
- 6 (IRS master file code)
- Formed
- 1946
- Principal officer
- Rebekah Phillips (as named on the Form 990)
- IRS ruling date
- 1 May 1946
- Status
- Code 01 (unconditional exemption)
- Form 990 filings on record
- 7, latest 2024
- IRS Publication 78
- PC (contributions deductible)
Most connected
Longest observed on the filings
≥4years on the filingsCharles Barker
≥4years on the filingsChris Jaworski
≥4years on the filingsClaire Tenscher
≥4years on the filingsDavid Urbaniak
Latest return
year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.- Total assets
- $3.4m
- Total liabilities
- $226k
- Net assets or fund balances
- $3.1m
- Contributions and grants received
- $940k
- Program service revenue
- $434k
- Grants and similar paid out
- $9k
- Employees
- 5
- Volunteers
- 500
Filed finances
1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.| Tax year | Total revenue | Total expenses | Surplus or deficit |
|---|---|---|---|
| 2024 | $1.4m | $1.1m | $353k |
As filed on the IRS Form 990. US dollars.
State registration
1 entityiBusiness-entity registers published by US states. These records are matched to this organisation by name and state, not by EIN, and are labelled as likely matches. Street addresses are not shown.Mazamas likely matchiMatched by exact name and state (and ZIP where shown). State registers do not publish EINs, so this is not a confirmed match. Source: Oregon Secretary of State, active business entities (data.oregon.gov tckn-sxa6). Licence not stated. Data last fetched 18 October 2026.
- State
- Oregon
- Entity type
- nonprofit corporation
- Status
- Active
- Formed
- 16 March 1899
- Registered agent
- Chelsea Tossing (city and state not held)