Steamboat Lake is a productive, nutrient-rich eutrophic lake in Routt County, Colorado. Water quality is graded D based on 1 sampling years through 2025. Compared to the 4 other monitored lakes in Routt County, Steamboat Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Colorado DNR, last sampled 2025-09-10. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Murky, only visible to about 6.6 ft. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.6 ft | D |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
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Fishing Steamboat Lake
Location
County Ranking
Ranked #5 of 5 lakes in Routt County
Cleaner Lakes Within 30 Miles
Steamboat Lake holds Grade D. One nearby lake has a higher grade.
Nearby Lakes in Routt County
Explore Steamboat Lake across LakeGrade
More Colorado Lake Rankings
Other Grade D Lakes in Colorado
Eutrophic Lakes in Colorado
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-09-10
Monitoring stations: 1