Lake Ripley vs Rock Lake
Water quality, depth, fish species, and recreation comparison.
Rock Lake reads lower on nutrients and algae than Lake Ripley. Both are in Jefferson County, Wisconsin.
Both Lake Ripley and Rock Lake sit in Wisconsin. A same-state comparison strips out the state-level water-quality regime as a variable: any differences in the readings here are about the lakes themselves, not the agencies sampling them. The readings are close: Lake Ripley and Rock Lake sit within a narrow band of each other on phosphorus, chlorophyll-a and clarity. The per-parameter table below shows where the small differences actually live.
With readings this close, the choice between the two lakes turns on non-water-quality factors: depth, fish species, public access, distance from home. The per-lake pages below cover all of those.
Lake Ripley
Moderate clarity, visible to about 9 ft.
Rock Lake
Good clarity, visible to about 12 ft.
Side-by-Side Metrics
| Metric | Lake Ripley | Rock Lake |
|---|---|---|
| Water Clarity | 9 ft | 12 ft Better |
| Phosphorus | 21.8 µg/L | 18.1 µg/L Better |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 44 ft | 60 ft Better |
| Surface Area | 420 acres | 1,365 acres |
| Public Access | Yes | Yes |
| Fish Species | 4 | 5 Better |
| Trophic State | mesotrophic | mesotrophic |
A green ✓ marks the better value for that metric (lower phosphorus / chlorophyll = cleaner; higher Secchi / depth / species count = better). Surface area and trophic state carry no tick — a bigger lake is not a better lake.
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Verdict
Lake Ripley and Rock Lake read the same on nutrients and algae overall. The tiebreakers come down to clarity (Lake Ripley: 9 ft, Rock Lake: 12 ft) and what you want from the lake. Lake Ripley has fewer fish species than Rock Lake.
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Where to stay near Lake Ripley and Rock Lake
Compare cabins, hotels, and vacation rentals around Lake Ripley and Rock Lake. Both lakes are pinned on the map, so you can see which stays sit nearer the one you pick. Switch to Satellite to see how close each is to the water.
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Source: EPA National Aquatic Resource Surveys, 2026.