Lakes / Colorado / Larimer County / Annex Reservoir Number 8
Annex Reservoir Number 8, Colorado
146 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Colorado
40.65 degrees N, 105.06 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 Annex Reservoir Number 8 Stacks Up
- Larger than 74% of the 778 lakes counted in Colorado.
- About 45 miles from Boulder, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| North Poudre Reservoir Number 10 | Larimer | 0.6 mi | 39 acres |
| Windsor Reservoir | Larimer | 0.7 mi | 386 acres |
| Elder Reservoir | Larimer | 0.9 mi | 79 acres |
| Dixon Reservoir | Larimer | 1.0 mi | 40 acres |
| Water Supply and Storage Reservoir Number 4 | Larimer | 1.5 mi | 75 acres |
| Richard Lake Reservoir Number Six | Larimer | 1.5 mi | 73 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Annex Reservoir Number 8
How Big Is Annex Reservoir Number 8?
Annex Reservoir Number 8 covers 146 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 128075861). Verified October 30, 2026.