Geneva Lake vs Lake Beulah
Water quality, depth, fish species, and recreation comparison.
Geneva Lake reads lower on nutrients and algae than Lake Beulah. Both are in Walworth County, Wisconsin.
Geneva Lake and Lake Beulah are both in Wisconsin — a same-state head-to-head where the comparison comes down to lake-specific differences in depth, watershed, and monitoring history rather than the broader state-level water-quality regime. The readings are close: Geneva Lake and Lake Beulah 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.
Geneva Lake
Crystal clear, you can see 21 ft down.
Lake Beulah
Good clarity, visible to about 10 ft.
Side-by-Side Metrics
| Metric | Geneva Lake | Lake Beulah |
|---|---|---|
| Water Clarity | 21 ft Better | 10 ft |
| Phosphorus | 13 µg/L Better | 13.4 µg/L |
| Chlorophyll-a (Algae) | 2.1 µg/L Better | 2.5 µg/L |
| Maximum Depth | 135 ft Better | 58 ft |
| Surface Area | 5,401 acres | 812 acres |
| Public Access | Yes | Yes |
| Fish Species | 6 Better | 3 |
| Trophic State | oligotrophic | 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
Geneva Lake and Lake Beulah read the same on nutrients and algae overall. The tiebreakers come down to clarity (Geneva Lake: 21 ft, Lake Beulah: 10 ft) and what you want from the lake. Geneva Lake supports more documented fish species.
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Where to stay near Geneva Lake and Lake Beulah
Compare cabins, hotels, and vacation rentals around Geneva Lake and Lake Beulah. 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.
Top-rated places to stay near Geneva Lake and Lake Beulah
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Source: EPA National Aquatic Resource Surveys, 2026.