Big Round Lake
Polk County, Wisconsin · WBIC 2627400
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
1,015 acres
Max depth
17 ft
DNR lake type
Complex, Warm, dark water color
Water clarity
5.5 ft
Moderate, measured Aug 2026
A warm-water lake type: the DNR groups it with lakes that warm up 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 1983), 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 Aug 16, 2026. 491 readings on record, 1992 to 2026.
Typical summer clarity (June to September): 4.9 ft, low, from 321 readings (2012 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 Big Round Lake - Deep Hole Near Milltown WI. Checked Oct 23, 2026.
Water temperature
Last measured Aug 16, 2026, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 16 (Apr 9 to Apr 24)
- Surface reaches 48°Fabout Apr 26 (Apr 19 to May 4)
- Surface reaches 64°Fabout May 26 (May 22 to May 31)
- June surface71°F, usually 70 to 73°F
- July surface77°F, usually 76 to 79°F
- August surface74°F, usually 72 to 76°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.
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.
Stocking history
- Walleyelast stocked 2025 (fry, large fingerling and small fingerling); stocked in 9 years since 2010
Stocking shows what was added to the lake, not what is in it now.
Wisconsin DNR annual fish stocking summary. Checked Oct 23, 2026.
Fish recorded near this lake
- Black Bullhead Ameiurus melas1970; 1 record
- Black Crappie Pomoxis nigromaculatus1965 to 1972; 4 records
- Bluegill Lepomis macrochirus1963 to 1972; 5 records
- Green Sunfish Lepomis cyanellus1965; 1 record
- Largemouth Bass Micropterus salmoides1963 to 1991; 17 records
- Muskellunge Esox masquinongy1970 to 1991; 7 records
- Northern Pike Esox lucius1970 to 1991; 14 records
- Pumpkinseed Lepomis gibbosus1965 to 1971; 3 records
- Rock Bass Ambloplites rupestris1965 to 1971; 3 records
- Walleye Sander vitreus1963 to 1991; 18 records
- Warmouth Lepomis gulosus1971; 1 record
- White Sucker Catostomus commersonii1970; 1 record
- Yellow Bullhead Ameiurus natalis1970; 1 record
- Yellow Perch Perca flavescens1963 to 1972; 4 records
Recorded in open fish survey and museum records (GBIF). A record shows a fish was found near this lake in that year, not that it is there now, and says nothing about how many. Most coordinates are rounded to about 1 km, so a record is attached only when one lake is the clear match.
Open fish survey and museum records from GBIF; datasets are listed on the sources page. Checked Oct 23, 2026.
Boat landings
- 1Big Round Lake AccessBoat ramp · Paved surface · State(dnr)
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Polk County
- Lost Lake1.5 miles away
- Clara Lake1.8 miles away
- Big Blake Lake2.2 miles away
- Little Blake Lake2.3 miles away
- Footes Lake2.4 miles away
- Mullins Lake2.8 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
- Stocking historyWisconsin DNR annual fish stocking summary, 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
- Fish recordedOpen fish survey and museum records, via GBIF, 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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