Lakes / Colorado / Larimer County / Johnson Reservoir
Johnson Reservoir, Larimer County, Colorado
45 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
40.94 degrees N, 106.01 degrees W - Larimer 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 Johnson Reservoir Stacks Up
- Larger than 38% of the 778 lakes counted in Colorado.
- About 75 miles from Boulder, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Eaton Reservoir | Larimer | 15 mi | 104 acres |
| Cowdrey Reservoir | Jackson | 17 mi | 72 acres |
| Upper Camp Lake | Larimer | 19 mi | 38 acres |
| Panhandle Reservoir | Larimer | 20 mi | 49 acres |
| Walden Reservoir | Jackson | 21 mi | 766 acres |
| Meadow Creek Reservoir | Jackson | 23 mi | 206 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Johnson Reservoir
How Big Is Johnson Reservoir?
Johnson Reservoir covers 45 acres in Larimer County, Colorado.
What Is the Largest Lake in Larimer County?
Horsetooth Reservoir is the largest lake in Larimer County, at 1,817 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 132228680). Verified October 30, 2026.