Courthouse Lake
Courthouse Lake in Park County, Montana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 25 acres.
- Area
- 25 acres
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Why Courthouse Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Courthouse Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Montana DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Courthouse Lake is a 25-acre lake in Park County, Montana.
Source: EPA Water Quality Portal sampling records, Montana DEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Courthouse Lake water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Courthouse Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Courthouse Lake
Compare lakeside cabins, hotels, and vacation rentals near Courthouse Lake in Park County, Montana — 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 Courthouse Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 25 acres |
No bathymetric survey has been published for Courthouse Lake, so its depth is not documented here.
Fishing Courthouse Lake
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Frequently asked questions about Courthouse Lake
Where is Courthouse Lake?
- Courthouse Lake is a lake in Park County, Montana. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Courthouse Lake?
- Courthouse Lake in Park County, Montana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 25 acres.
Is Courthouse Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Courthouse Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Courthouse Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.