Wild Horse Lake
Wild Horse Lake in Petroleum County, Montana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1929 acres.
- Area
- 1,929 acres
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Why Wild Horse 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 Wild Horse 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.
Wild Horse Lake is a 1,929-acre lake in Petroleum County, Montana.
Source: EPA Water Quality Portal sampling records, Montana DEQ, last sampled recent years. Grade methodology: LakeQuality methodology.
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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 Wild Horse 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 Wild Horse Lake
Compare lakeside cabins, hotels, and vacation rentals near Wild Horse Lake in Petroleum 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 Wild Horse Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,929 acres |
No bathymetric survey has been published for Wild Horse Lake, so its depth is not documented here.
Fishing Wild Horse Lake
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Frequently asked questions about Wild Horse Lake
Where is Wild Horse Lake?
- Wild Horse Lake is a lake in Petroleum 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 Wild Horse Lake?
- Wild Horse Lake in Petroleum County, Montana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1929 acres.
Is Wild Horse Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Wild Horse 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 Wild Horse Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.