Boulder Lake is a cold, clear oligotrophic lake in Sublette County, Wyoming. Water quality is graded A based on 1 sampling years through 2019. Compared to the 11 other monitored lakes in Sublette County, Boulder Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DNR, last sampled 2019-09-09. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 27.7 ft down. Trophic State Index: 29.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 27.7 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 29 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Boulder Lake
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Fishing Boulder Lake
Location
County Ranking
Ranked #4 of 12 lakes in Sublette County
Nearby Lakes in Sublette County
Explore Boulder Lake across LakeGrade
More Wyoming Lake Rankings
Other Grade A Lakes in Wyoming
Fremont County · Clarity: 15.9 ft
Lincoln County · Clarity: 11.8 ft
Lincoln County · Clarity: 15 ft
Lincoln County · Clarity: 13.3 ft
Lincoln County · Clarity: 12.3 ft
Park County · Clarity: 10.6 ft
Oligotrophic Lakes in Wyoming
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: 2019-09-09
Monitoring stations: 2