Lakes / Oregon / Clackamas County / Mompano Reservoir
Mompano Reservoir, Oregon
52 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
45.31 degrees N, 122.50 degrees W - Clackamas County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Mompano Reservoir Stacks Up
- Larger than 36% of the 642 lakes counted in Oregon.
- About 16 miles from Portland, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Estacada Lake | Clackamas | 7.9 mi | 60 acres |
| Faraday Lake | Clackamas | 9.8 mi | 48 acres |
| North Fork Reservoir | Clackamas | 11 mi | 44 acres |
| Lake Oswego | Clackamas | 11 mi | 432 acres |
| North Fork Reservoir | Clackamas | 13 mi | 218 acres |
| Fairview Lake | Multnomah | 17 mi | 108 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Mompano Reservoir
How Big Is Mompano Reservoir?
Mompano Reservoir covers 52 acres in Clackamas County, Oregon.
What Is the Largest Lake in Clackamas County?
Timothy Lake is the largest lake in Clackamas County, at 1,400 acres.
Largest Lakes in Oregon
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Upper Klamath Lake | Klamath | 62,095 acres | - |
| 2 | Lake Umatilla | Morrow | 50,042 acres | - |
| 3 | Lake Abert | Lake | 37,137 acres | - |
| 4 | Summer Lake | Lake | 31,602 acres | - |
| 5 | Harney Lake | Harney | 31,290 acres | - |
All 642 Oregon lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 147815545). Verified October 30, 2026.