Routt County, Colorado · Water Quality Report Card
Catamount Lake Top
Catamount Lake Top in Routt County, Colorado is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 46 µg/L.
- Mean depth
- ~26 ft est.
- Type
- Eutrophic
- Trend
- ↓ Declining
Catamount Lake Top is a productive, nutrient-rich eutrophic lake in Routt County, Colorado with an estimated average depth of about 26 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, CDPHE, last sampled 2020-08-18. Grade methodology: LakeGrade methodology.
Watch Catamount Lake Top water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not rated for swimming — there is not enough monitoring data to judge this lake
Water Quality Grade: Not rated
No clarity data. Phosphorus level: 46 µg/L. Trophic State Index: 59.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 46 µg/L | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 59 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~26 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Colorado has not published bathymetry for Catamount Lake Top.
Where to stay near Catamount Lake Top
Compare lakeside cabins, hotels, and vacation rentals near Catamount Lake Top in Routt County, Colorado — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Catamount Lake Top
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Catamount Lake Top?
Get lake water-quality report cards plus the best cabin & lodging deals near Catamount Lake Top — straight to your inbox. No spam, unsubscribe anytime.
Planning a whole trip? See where to stay at Colorado’s top lakes →
Fishing Catamount Lake Top
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +26.5 µg/L/yr | 2 |
Location
Nearby Lakes in Routt County
Explore Catamount Lake Top across LakeGrade
9 mi away · 283 ft
Species activity outlook by water temperature and season
Where to stay at Colorado's top lakes, each with its grade
High nutrients, frequent algae, reduced clarity
Colorado's cleanest and most-polluted lakes, ranked
More Colorado Lake Rankings
Other Lakes in Colorado
Eutrophic Lakes in Colorado
More records, surveys & data sources
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
2 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Colorado Dept. of Public Health & Environment-WQCD
21COL001_WQX2 samples · 2020
Analytical methods
- Phosphorus by Colorimetry
- Nitrogen in Water by Pyrolysis Detection
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2020-08-18
Monitoring stations: 1