Caroline Lake
Iron County, Wisconsin · WBIC 2938000
The DNR lists this lake's watershed (Headwaters Bad River) as suspect or infected with VHS, a fish virus. The listing covers the watershed, not a test of this lake. About VHS
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
130 acres
Max depth
8 ft
DNR lake type
Simple, Cool, clear water color
Water clarity
2 ft
Low, measured Jul 2010
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 1967), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
2 ft Secchi depthLowOlder reading
Last measured Jul 23, 2010. 3 readings on record, 2000 to 2010.
Only a few readings are on record.
Nothing has been measured in the last 5 years, so this may not match the lake today.
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 CAROLINE LAKE - CAROLINE LAKE. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 23 (Apr 16 to Apr 30)
- Surface reaches 48°Fabout Apr 26 (Apr 18 to May 6)
- Surface reaches 64°Fabout May 25 (May 18 to May 28)
- June surface70°F, usually 68 to 71°F
- July surface75°F, usually 73 to 77°F
- August surface71°F, usually 70 to 73°F
Mixes regularly through the summer instead of forming a warm top layer.
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.
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
- 1Caroline Lake Access (listed under Ashland County)Boat ramp · Gravel surface · Other
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Iron County
- McCarthy Lake1.6 miles away
- Maki Lake1.9 miles away
- Shirley Lake5.9 miles away
- O'Brien Lake7.7 miles away
- Shine Lake9.1 miles away
- Upson Lake9.8 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
- 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
- Depth map linkWisconsin DNR lake maps list, 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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