Marais Lake
Marais Lake in Crawford County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 769 acres.
- Area
- 769 acres
- Public access
- Yes
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Why Marais 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 Marais 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 WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Marais Lake is a 769-acre lake in Crawford County, Wisconsin. Limited fish-species data available. Public access is available with 4 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Marais 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 Marais 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 Marais Lake
Compare lakeside cabins, hotels, and vacation rentals near Marais Lake in Crawford County, Wisconsin — 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 Marais Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 769 acres |
| Public Access | Yes |
No bathymetric survey has been published for Marais Lake, so its depth is not documented here.
Recreation & Access
- AmbroPublic
- Lakeview CourtSemi-private
- Winneshiek LaneSemi-private
- WinneshiekSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Marais Lake
Nearby Lakes in Crawford County
Frequently asked questions about Marais Lake
Where is Marais Lake?
- Marais Lake is a lake in Crawford County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Marais Lake?
- Marais Lake in Crawford County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 769 acres.
Is Marais Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Marais 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 Marais Lake?
- Marais Lake has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Ambro, Lakeview Court, Winneshiek Lane, Winneshiek. Public access is listed as yes.
Explore Marais Lake across LakeQuality
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Where this data comes from
Measurements for Marais 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