Lakes / Colorado / Mesa County / Casto Reservoir
Casto Reservoir, Colorado
28 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
38.73 degrees N, 108.67 degrees W - Mesa 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 Casto Reservoir Stacks Up
- Larger than 10% of the 778 lakes counted in Colorado.
- About 24 miles from Grand Junction, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Cheney Reservoir | Mesa | 22 mi | 51 acres |
| Thompson Reservoir Number 3 | Mesa | 23 mi | 41 acres |
| Hallenbeck Reservoir | Mesa | 26 mi | 56 acres |
| Juniata Reservoir | Mesa | 27 mi | 99 acres |
| Buckeye Reservoir | Montrose | 28 mi | 109 acres |
| Bolen, Anderson, and Jacobs Reservoir Number Two | Mesa | 32 mi | 30 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Casto Reservoir
How Big Is Casto Reservoir?
Casto Reservoir covers 28 acres in Mesa County, Colorado.
What Is the Largest Lake in Mesa County?
Vega Reservoir is the largest lake in Mesa County, at 679 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 62503321). Verified October 30, 2026.