Mars Lake
Oneida County, Wisconsin · WBIC 1577100
Size
41 acres
Max depth
12 ft
DNR lake type
Complex, Cool, dark water color
Water clarity
4.5 ft
Low, measured Aug 2025
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 1981), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
4.5 ft Secchi depthLow
Last measured Aug 17, 2025. 11 readings on record, 2024 to 2025.
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 Mars Lake - Deep Hole. Checked Oct 23, 2026.
Water temperature
Last measured Aug 16, 2024, too long ago to show as the current temperature.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026).
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
- 1Mars Lake AccessBoat ramp · Township
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Oneida County
- Venus Lake0.3 miles away
- Neptune Lake0.7 miles away
- Tank Lake2.9 miles away
- Leith Lake3.5 miles away
- Fish Lake5.3 miles away
- Pelican Lake5.4 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
- 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.