Boulder Lake vs Crawling Stone Lake
Water quality, depth, fish species, and recreation comparison.
Boulder Lake and Crawling Stone Lake read the same on nutrients and algae. Both are in Vilas County, Wisconsin.
Both Boulder Lake and Crawling Stone 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. These two sit close on the readings, Boulder Lake versus Crawling Stone Lake. The deciding factors for a recreational visitor are likely physical (depth, access, fish species) rather than water-quality differences.
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.
Boulder Lake
Murky, only visible to about 5.6 ft.
Crawling Stone Lake
Crystal clear, you can see 16 ft down.
Side-by-Side Metrics
| Metric | Boulder Lake | Crawling Stone Lake |
|---|---|---|
| Water Clarity | 5.6 ft | 16 ft Better |
| Phosphorus | 21.6 µg/L | 10.5 µg/L Better |
| Chlorophyll-a (Algae) | No data | No data |
| Maximum Depth | 23 ft | 87 ft Better |
| Surface Area | 516 acres | 1,483 acres |
| Public Access | Yes | Unknown |
| Fish Species | 6 | 6 |
| Trophic State | eutrophic | oligotrophic |
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.
Swap a lake
Compare Boulder Lake or Crawling Stone Lake against a different lake.
Verdict
Both lakes earn the same Grade B. The tiebreakers come down to clarity (Boulder Lake: 5.6 ft, Crawling Stone Lake: 16 ft) and what you want from the lake. Boulder Lake matches its peer on species count.
Source: EPA National Aquatic Resource Surveys, 2026.