Willow Flowage
Oneida County, Wisconsin · WBIC 1528300
The DNR has advice about eating fish from this water. How much is safe depends on the fish and on who is eating it. Look it up on the DNR site
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
6,306 acres
Max depth
30 ft
DNR lake type
Complex, Cool, dark water color
Water clarity
5.2 ft
Moderate, measured Aug 2007
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 1971), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
5.2 ft Secchi depthModerateOlder reading
Last measured Aug 28, 2007. 1 reading on record, 2007.
Only one reading is on record.
Nothing has been measured in the last 5 years, so this may not match the lake today.
Measured at the monitoring station named “WILLOW LAKE - WILLOW RESERVOIR - DEEPEST SPOT”.
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 WILLOW LAKE - WILLOW RESERVOIR - DEEPEST SPOT. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 19 (Apr 10 to Apr 29)
- Surface reaches 48°Fabout May 2 (Apr 19 to May 8)
- Surface reaches 64°Fabout May 29 (May 25 to Jun 5)
- June surface69°F, usually 68 to 71°F
- July surface75°F, usually 73 to 76°F
- August surface72°F, usually 70 to 74°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
- Muskellungelast stocked 2022 (large fingerling); stocked in 5 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
- Largemouth Bass Micropterus salmoides2008; 2 records
- Muskellunge Esox masquinongy1988 to 2008; 3 records
- Northern Pike Esox lucius2008; 2 records
- Smallmouth Bass Micropterus dolomieu2008; 2 records
- Walleye Sander vitreus1988 to 2008; 6 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
- 1Cedar Falls AccessBoat ramp · Concrete Panels surface · Township
Directions - 2Willow Reservoir Access 2Boat ramp · Concrete Panels surface · State(dnr)
Directions - 3Willow Flowage Access 1Boat ramp · Concrete surface · State(dnr)
Directions - 4Sportsmans LandingBoat ramp · Concrete surface · State(dnr)
Directions - 5McCord LandingBoat ramp · Unimproved surface · State(dnr)
Directions - Jerrys LandingBoat ramp · Dirt surface · State(dnr)
- Talbots LandingBoat ramp · Dirt surface · State(dnr)
- Back Bay LandingBoat ramp · Concrete surface · State(dnr)
Some landings are matched to this lake by name only, because the DNR list gives no location for them. They have no pin.
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
More lakes in Oneida County
- Skunk Lake2.7 miles away
- Pier Lake4.4 miles away
- Lake Marie4.6 miles away
- Lake Junnie5.0 miles away
- Smith Lake5.0 miles away
- Twin Lakes5.1 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
- Fish consumption advice flagWisconsin DNR advisory areas (flag and link only), checked Oct 24, 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.