Mountain Run Lake is a productive, nutrient-rich eutrophic lake in Culpeper County, Virginia. Water quality is graded C based on 2 sampling years through 2022. Compared to the 1 other monitored lakes in Culpeper County, Mountain Run Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Virginia DNR, last sampled 2022-10-06. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swim with caution, moderate algae may be present
Water Quality Grade: C, Fair
Very murky, less than 2.6 ft of visibility. Phosphorus level: 40 µg/L. Chlorophyll-a: 17.3 µg/L. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.6 ft | F |
| Phosphorus | 40 µg/L | C |
| Chlorophyll-a (Algae) | 17.3 µg/L | C |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Mountain Run Lake
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Fishing Mountain Run Lake
Location
County Ranking
Ranked #1 of 2 lakes in Culpeper County
Cleaner Lakes Within 30 Miles
Mountain Run Lake holds Grade C. 2 nearby lakes hold higher grades.
- AHunting Run ReservoirSpotsylvania County · 24.6 mi · Two grade letters higher (C → A)
- AHunting Run Reservior LakeSpotsylvania County · 24.9 mi · Two grade letters higher (C → A)
Nearby Lakes in Culpeper County
Explore Mountain Run Lake across LakeGrade
More Virginia Lake Rankings
Other Grade C Lakes in Virginia
Eutrophic Lakes in Virginia
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: 2022-10-06
Monitoring stations: 2