Lakes / Oregon / Malheur County / Jaca Reservoir
Jaca Reservoir, Oregon
814 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
42.71 degrees N, 117.19 degrees W - Malheur 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 Jaca Reservoir Stacks Up
- Larger than 87% of the 642 lakes counted in Oregon.
- About 227 miles from Bend, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Deary Reservoir | Malheur | 2.8 mi | 33 acres |
| Upper Dry Lake Number 2 | Malheur | 3.2 mi | 57 acres |
| Upper Dry Lake Number 1 | Malheur | 3.5 mi | 31 acres |
| Coyote Creek Reservoir | Malheur | 5.1 mi | 164 acres |
| Gartin Reservoir | Malheur | 5.3 mi | 140 acres |
| Parsnip Creek Diversion Reservoir | Malheur | 5.8 mi | 33 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Jaca Reservoir
How Big Is Jaca Reservoir?
Jaca Reservoir covers 814 acres in Malheur County, Oregon.
What Is the Largest Lake in Malheur County?
Lake Owyhee is the largest lake in Malheur County, at 11,120 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 131376153). Verified October 30, 2026.