Routt County Lake Quality
Colorado, 5 lakes, average grade C (Fair)
Only 5 lakes in Routt County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.
Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Pearl Lake (B) is the cleanest in the county.
Quick Answers for Routt County
Planning a trip? Check special fishing regulations for Pearl Lake — or check the official Colorado fishing regulations.
All Lakes in Routt County
| Rank | Lake | Grade | Clarity | Phosphorus |
|---|---|---|---|---|
| 1 | Pearl Lake | B | 14.1 ft | - |
| 2 | Stagecoach Reservoir | C | 7.5 ft | 33.5 µg/L |
| 3 | Steamboat Lake | D | 6.6 ft | - |
Other Counties in Colorado
See how Routt County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 12 states.
Where to stay near Routt County
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Source: EPA National Aquatic Resource Surveys, 2026.