Halfmoon Lake
Eau Claire County, Wisconsin · WBIC 2125400
The DNR lists this lake's watershed (Lowes Creek-Chippewa 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
132 acres
Max depth
9 ft
DNR lake type
Simple, Warm, dark water color
Water clarity
2.9 ft
Low, measured Aug 2011
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 1982), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
2.9 ft Secchi depthLowOlder reading
Last measured Aug 24, 2011. 14 readings on record, 1993 to 2011.
Nothing has been measured in the last 5 years, so this may not match the lake today.
Measured at the monitoring station named “HALF MOON LAKE - DEEP HOLE”.
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 HALF MOON LAKE - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 12 (Apr 5 to Apr 24)
- Surface reaches 48°Fabout Apr 17 (Apr 13 to Apr 27)
- Surface reaches 64°Fabout May 11 (May 5 to May 20)
- June surface75°F, usually 74 to 76°F
- July surface80°F, usually 79 to 82°F
- August surface76°F, usually 74 to 78°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.
Stocking history
- Rainbow Troutlast stocked 2022 (yearling); stocked in 11 years since 2010
- Northern Pikelast stocked 2021 (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.
Boat landings
- 1Carson Park Boat RampBoat ramp · Gravel surface · City
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
Fishing from shore
- HALF MOON LAKE FISHING PIERDirections · DNR details
Wisconsin DNR shore fishing sites. Checked Oct 24, 2026.
More lakes in Eau Claire County
- Cooley Lake4.8 miles away
- Altoona Lake4.9 miles away
- Elk Creek Lake6.3 miles away
- Fall Creek Pond12 miles away
- Eau Claire Lake21 miles away
- Coon Fork Flowage26 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
- VHS statusWisconsin DNR VHS status by watershed, checked Oct 24, 2026
- Shore fishing sitesWisconsin DNR shore fishing sites, 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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