Lakes / Colorado / Grand County / Lake Granby
Lake Granby, Colorado
7,075 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
40.16 degrees N, 105.85 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 Lake Granby Stacks Up
- Ranks #3 for surface area among the Colorado lakes counted so far - 7,075 acres.
- The largest lake in Grand County among those counted.
- About 32 miles from Boulder, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Shadow Mountain Lake | Grand | 5.0 mi | 1,315 acres |
| Willow Creek Reservoir | Grand | 5.8 mi | 292 acres |
| Grand Lake | Grand | 6.3 mi | 483 acres |
| Monarch Lake | Grand | 6.6 mi | 149 acres |
| Columbine Lake | Grand | 7.0 mi | 30 acres |
| Windy Gap Reservoir | Grand | 7.8 mi | 102 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Granby
How Big Is Lake Granby?
Lake Granby covers 7,075 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 88894713). Verified October 30, 2026.