Lakes / Colorado / Hinsdale County / Lost Lake Reservoir Number 1
Lost Lake Reservoir Number 1, Colorado
57 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
37.75 degrees N, 107.31 degrees W - Hinsdale 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 Lost Lake Reservoir Number 1 Stacks Up
- Larger than 49% of the 778 lakes counted in Colorado.
- About 103 miles from Aspen, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Rio Grande Reservoir | Hinsdale | 1.9 mi | 809 acres |
| Hermit Reservoir 3 | Hinsdale | 3.8 mi | 38 acres |
| Regan Lake | Hinsdale | 4.6 mi | 74 acres |
| Hermit Lakes | Hinsdale | 5.1 mi | 64 acres |
| South Lazy U Reservoir Number 2 | Hinsdale | 5.6 mi | 28 acres |
| Castle Rock Lake | Hinsdale | 5.8 mi | 51 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lost Lake Reservoir Number 1
How Big Is Lost Lake Reservoir Number 1?
Lost Lake Reservoir Number 1 covers 57 acres in Hinsdale County, Colorado.
What Is the Largest Lake in Hinsdale County?
Rio Grande Reservoir is the largest lake in Hinsdale County, at 809 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 136353642). Verified October 30, 2026.