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B

Little Crawling Stone Deep Lake

Vilas County, WisconsinLimited DataOligotrophic

Little Crawling Stone Deep Lake comes in at a B on the grading rubric — a respectable showing for a Wisconsin lake of its size and depth. 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 96 of 191 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.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 14 ft. Trophic State Index: 39.

MetricValueGrade
Water Clarity (Secchi Depth)14 ftB
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)39Oligotrophic

Low nutrients, clear water, excellent for swimming

Lake Details

CharacteristicValue
Maximum Depth44 ft
Surface Area113 acres
Public AccessYes

Fish Species

Click a species to see every graded lake where it is documented.

→ 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 & Introduced Species

Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.

Banded Mystery SnailChinese Mystery SnailRusty Crayfish

Water Quality Trend: Stable

Based on 7 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Declining-0.509 m/yr7
Phosphorus Improving-0.93 µg/L/yr5
See year-by-year chart →

Recreation & Access

1
Boat Landings
Yes
Public Access

Location

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County Ranking

Ranked #96 of 191 lakes in Vilas County

Cleaner Lakes Within 30 Miles

Little Crawling Stone Deep Lake holds Grade B. 2 nearby lakes hold higher grades.

Nearby Lakes in Vilas County

WI DNR Lake Profile

Authoritative data from the Wisconsin DNR LakePages. Monitored by volunteers since 1998. 1 station on file (most recent sample 2025).

DNR Assessment
Reported
Trophic State Index 37 (oligotrophic) · 5-year average

Fish Species (DNR-rated)

Panfish(Common)Smallmouth Bass(Common)Musky(Present)Largemouth Bass(Present)Northern Pike(Present)Walleye(Present)

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

Public boat-access points from the USGS National Boat Ramps inventory

Most recent sample: 2020-10-08

Monitoring stations: 1

Where to stay near Little Crawling Stone Deep Lake

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