Thornapple Flowage
Rusk County, Wisconsin · WBIC 2227500
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
268 acres
Max depth
19 ft
DNR lake type
Complex, Riverine
Water clarity
5 ft
Moderate, measured Aug 2019
A river-like water type, with flow instead of a still basin. 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 1971), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
5 ft Secchi depthModerateOlder reading
Last measured Aug 27, 2019. 23 readings on record, 2004 to 2019.
Typical summer clarity (June to September): 5 ft, moderate, from 8 readings (2012 to 2019).
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 THORNAPPLE FLOWAGE - DEEP HOLE. 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
- 1Flambeau River AccessBoat ramp · Gravel surface · Other
Directions - 2Thornapple Flowage AccessBoat ramp · Concrete surface · Other
Directions - 3Port Arthur Boat RampBoat ramp · Concrete surface · Accessible features · State(dnr)
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Rusk County
- Bass Lake3.3 miles away
- Saxton Lake3.4 miles away
- Dump Lake4.7 miles away
- Sunfish Lake5.1 miles away
- Bruce Lake5.1 miles away
- Amacoy Lake6.2 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.
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