Lakes / Colorado / Grand County / Monarch Lake
Monarch Lake, Colorado
149 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
40.11 degrees N, 105.74 degrees W - Grand 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 Monarch Lake Stacks Up
- Larger than 75% of the 778 lakes counted in Colorado.
- About 26 miles from Boulder, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Meadow Creek Reservoir | Grand | 3.5 mi | 166 acres |
| Crater Lake | Grand | 4.6 mi | 27 acres |
| Lake Granby | Grand | 6.6 mi | 7,075 acres |
| Lake Isabelle | Boulder | 7.0 mi | 31 acres |
| Long Lake | Boulder | 8.2 mi | 41 acres |
| Albion Lake | Boulder | 8.4 mi | 32 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Monarch Lake
How Big Is Monarch Lake?
Monarch Lake covers 149 acres in Grand County, Colorado.
What Is the Largest Lake in Grand County?
Lake Granby is the largest lake in Grand County, at 7,075 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 88875213). Verified October 30, 2026.