Mountain Lake
Mountain Lake in Franklin County, Pennsylvania is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 44 acres.
- Area
- 44 acres
- Public access
- Yes
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Why Mountain 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 Mountain 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 PA DEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Mountain Lake is a 44-acre lake in Franklin County, Pennsylvania. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, PA DEP, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Mountain 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 Mountain 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 Mountain Lake
Compare lakeside cabins, hotels, and vacation rentals near Mountain Lake in Franklin County, Pennsylvania — 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 Mountain Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 44 acres |
| Public Access | Yes |
No bathymetric survey has been published for Mountain Lake, so its depth is not documented here.
Recreation & Access
- Fannettsburg DamPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Mountain Lake
Nearby Lakes in Franklin County
Frequently asked questions about Mountain Lake
Where is Mountain Lake?
- Mountain Lake is a lake in Franklin County, Pennsylvania. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Mountain Lake?
- Mountain Lake in Franklin County, Pennsylvania is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 44 acres.
Is Mountain Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Mountain Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Mountain Lake?
- Mountain Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Fannettsburg Dam. Public access is listed as yes.
Explore Mountain Lake across LakeQuality
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Where this data comes from
Measurements for Mountain Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory