Little Crawling Stone Deep Lake
Vilas County, WisconsinLimited DataOligotrophic
On the LakeGrade rubric, Little Crawling Stone Deep Lake pulls an A: clarity at 45.9 ft and phosphorus readings still being added put it in the top bracket for Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.
The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. A maximum depth of 44 ft puts Little Crawling Stone Deep Lake in the middle of Wisconsin's depth distribution. At 113 acres, Little Crawling Stone Deep Lake fits the Wisconsin median for monitored lakes, with partial shoreline records. Little Crawling Stone Deep Lake sits at rank 103 of 202 in Vilas County, in the lower half of the local distribution.
Little Crawling Stone Deep Lake has at least one documented invasive species (Banded Mystery Snail), so boaters and anglers should observe clean-drain-dry steps when leaving the lake. Walleye are documented at Little Crawling Stone Deep Lake, one of 6 fish species on record for the lake. A documented public access point at Little Crawling Stone Deep Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2020-10-08. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 45.9 ft down. Trophic State Index: 22.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 45.9 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 22 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 44 ft |
| Surface Area | 113 acres |
| Public Access | Yes |
Fish Species
Click a species to see all Wisconsin and Minnesota lakes where it is found.
→ Best fishing times for Little Crawling Stone Deep Lake (14-day solunar calendar)
→ Is it safe to eat fish from Little Crawling Stone Deep Lake? (mercury & PFAS guide)
→ Little Crawling Stone Deep Lake fishing regulations (limits, seasons, special rules)
Invasive Species
Water Quality Trend: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.464 m/yr | 7 |
| Phosphorus | ↑ Improving | -0.93 µg/L/yr | 5 |
Recreation & Access
Location
County Ranking
Ranked #103 of 202 lakes in Vilas County
Nearby Lakes in Vilas County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Waukesha County · Clarity: 14.6 ft
Waukesha County · Clarity: 13.8 ft
Walworth County · Clarity: 19 ft
Washington County · Clarity: 12 ft
Kenosha County · Clarity: 10.1 ft
Washington County · Clarity: 12.5 ft
Oligotrophic Lakes in Wisconsin
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1998. 1 station on file (most recent sample 2025).
Fish Species (DNR-rated)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Fish and recreation data from Wisconsin DNR Lakes
Most recent sample: 2020-10-08
Monitoring stations: 1