Rock Lake
Vilas County, Wisconsin · WBIC 2311700
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
122 acres
Max depth
18 ft
DNR lake type
Complex, Cool, dark water color
Water clarity
5.5 ft
Moderate, measured Sep 2026
A cool-water lake type: the DNR groups it with lakes that stay cooler through summer. This describes the lake type in general, not this lake in particular.
Outline
Numbered dots are boat landings; tap one for directions. The list below has the same numbers. Drawn from the DNR's 24K hydrography (surveyed 1982), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
5.5 ft Secchi depthModerate
Last measured Sep 10, 2026. 202 readings on record, 1991 to 2026.
Typical summer clarity (June to September): 6 ft, moderate, from 136 readings (2013 to 2026).
Secchi depth is how far down a white disk stays visible. A bigger number means clearer water. Clear means a Secchi depth of 10 feet or more, moderate 5 to 10 feet, low under 5 feet.
Wisconsin DNR water monitoring (volunteer and staff), via the Water Quality Portal; station Rock Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
64.4°F surface, measured Sep 17, 2026
Measured near the surface (0.91 m down). A single reading, not a daily value.
A typical year Modeled estimate
- Ice goes outabout Apr 25 (Apr 19 to Apr 30)
- Surface reaches 48°Fabout May 3 (Apr 25 to May 9)
- Surface reaches 64°Fabout May 25 (May 18 to May 27)
- June surface70°F, usually 68 to 71°F
- July surface75°F, usually 74 to 76°F
- August surface71°F, usually 70 to 72°F
Forms a warm top layer around May 25, lasting about 54 days.
A computer model of this lake's typical weather and water, built from 15 years, 2005 to 2019. Ranges show the middle half of years. The model was not calibrated against measured temperatures for this lake. It is an estimate, not a measurement.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). Modeled: U.S. Geological Survey lake temperature data release (doi:10.5066/P9CA6XP8).
Today at the lake
Forecast: National Weather Service (no endorsement implied). Sunrise, sunset and moon phase are calculated. The moon phase can be a day off.
Boat landings
- 1North Turtle Lake RampBoat ramp · Paved surface · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Vilas County
- Nell Lake0.9 miles away
- Lake Yolanda1.1 miles away
- Geneveive Lake1.1 miles away
- Lake Helen1.2 miles away
- North Turtle Lake1.4 miles away
- Lake Adelade1.5 miles away
Where this comes from
- Size, depth and lake typeWisconsin DNR lake classifications, checked Oct 23, 2026
- OutlineWisconsin DNR 24K hydrography, checked Oct 23, 2026
- Regulations linkWisconsin DNR fishing regulations (linked, not restated), checked Oct 23, 2026
- Boat landingsWisconsin DNR public boat access sites, checked Oct 23, 2026
- Water clarityWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Measured temperatureWisconsin DNR water monitoring, via the Water Quality Portal, checked Oct 23, 2026
- Typical-year temperatureU.S. Geological Survey lake temperature model (modeled estimate), checked Oct 23, 2026
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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