Lakes / Colorado / Washington County / A-27 Reservoir
A-27 Reservoir, Colorado
31 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
40.33 degrees N, 103.27 degrees W - Washington 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 A-27 Reservoir Stacks Up
- Larger than 16% of the 778 lakes counted in Colorado.
- About 100 miles from Denver, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Prewitt Reservoir | Washington | 7.6 mi | 1,888 acres |
| Pawnee Raw Water Reservoir | Morgan | 22 mi | 137 acres |
| Deering Lake | Washington | 26 mi | 78 acres |
| North Sterling Reservoir | Logan | 31 mi | 2,650 acres |
| Bijou Number 2 Reservoir | Morgan | 37 mi | 414 acres |
| Rosener Reservoir | Morgan | 37 mi | 36 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About A-27 Reservoir
How Big Is A-27 Reservoir?
A-27 Reservoir covers 31 acres in Washington County, Colorado.
What Is the Largest Lake in Washington County?
Prewitt Reservoir is the largest lake in Washington County, at 1,888 acres.
Largest Lakes in Colorado
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | John Martin Reservoir | Bent | 11,686 acres | - |
| 2 | Blue Mesa Reservoir | Gunnison | 8,944 acres | - |
| 3 | Lake Granby | Grand | 7,075 acres | - |
| 4 | Lake Meredith | Crowley | 5,539 acres | - |
| 5 | Adobe Creek Reservoir | Bent | 4,770 acres | - |
All 778 Colorado 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 126892046). Verified October 30, 2026.