Castle Rock Lake
Castle Rock Lake in Juneau County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 12991 acres.
- Area
- 12,991 acres
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Why Castle Rock 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 Castle Rock 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.
Castle Rock Lake is a 12,991-acre lake in Juneau County, Wisconsin.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Castle Rock 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 Castle Rock 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 Castle Rock Lake
Compare lakeside cabins, hotels, and vacation rentals near Castle Rock Lake in Juneau 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 Castle Rock Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 12,991 acres |
No bathymetric survey has been published for Castle Rock Lake, so its depth is not documented here.
Recreation & Access
- Little Roche A Cri - SouthPublic
- Buckhorn State ParkPublic
- Snug HarborSemi-private
- Little Roche A Cri - NorthSemi-private
- Mays PointSemi-private
- Lakeside WaterfrontSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Castle Rock Lake
Nearby Lakes in Juneau County
Frequently asked questions about Castle Rock Lake
Where is Castle Rock Lake?
- Castle Rock Lake is a lake in Juneau 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 Castle Rock Lake?
- Castle Rock Lake in Juneau County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 12991 acres.
Is Castle Rock Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Castle Rock 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 Castle Rock Lake?
- Castle Rock Lake has 6 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Little Roche A Cri - South, Buckhorn State Park, Snug Harbor, Little Roche A Cri - North, among others.
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Where this data comes from
Measurements for Castle Rock 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