Lakes / Colorado / Boulder County / Lake Isabelle
Lake Isabelle, Colorado
31 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
40.07 degrees N, 105.62 degrees W - Boulder 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 Isabelle Stacks Up
- Larger than 15% of the 778 lakes counted in Colorado.
- About 19 miles from Boulder, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Long Lake | Boulder | 1.4 mi | 41 acres |
| Albion Lake | Boulder | 1.7 mi | 32 acres |
| Crater Lake | Grand | 2.4 mi | 27 acres |
| Goose Lake | Boulder | 2.8 mi | 40 acres |
| Left Hand Reservoir | Boulder | 3.0 mi | 96 acres |
| Island Lake | Boulder | 3.0 mi | 34 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Lake Isabelle
How Big Is Lake Isabelle?
Lake Isabelle covers 31 acres in Boulder County, Colorado.
What Is the Largest Lake in Boulder County?
Boulder Reservoir is the largest lake in Boulder County, at 536 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 128058297). Verified October 30, 2026.