Decorah Lake
Juneau County, Wisconsin · WBIC 1304600
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
104 acres
Max depth
15 ft
DNR lake type
Complex, Riverine
Water clarity
3 ft
Low, measured Sep 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
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
3 ft Secchi depthLowOlder reading
Last measured Sep 26, 2019. 17 readings on record, 2004 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 DECORAH LAKE - DEEP HOLE ABOVE DAM. Checked Oct 23, 2026.
Water temperature
A typical year Modeled estimate
- Ice goes outabout Apr 8 (Apr 2 to Apr 17)
- Surface reaches 48°Fabout Apr 21 (Apr 12 to Apr 27)
- Surface reaches 64°Fabout May 15 (May 9 to May 24)
- June surface75°F, usually 74 to 77°F
- July surface82°F, usually 80 to 83°F
- August surface78°F, usually 75 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
- Walleyelast stocked 2021 (large fingerling); stocked in 4 years since 2010
- Northern Pikelast stocked 2017 (large fingerling); stocked in 3 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 Crappie Pomoxis nigromaculatus2004; 1 record
- Blacknose Shiner Notropis heterolepis2004; 1 record
- Bluegill Lepomis macrochirus2004; 3 records
- Common Carp Cyprinus carpio2004; 1 record
- Golden Shiner Notemigonus crysoleucas2004; 1 record
- Largemouth Bass Micropterus salmoides2004; 3 records
- Pumpkinseed Lepomis gibbosus2004; 3 records
- Warmouth Lepomis gulosus2004; 1 record
- Yellow Perch Perca flavescens2004; 3 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
- Riverside Park & Lake Decorah Boat LaunchBoat ramp · Concrete surface · Accessible features · City
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 Juneau County
- Lemonweir Millpond3.2 miles away
- New Lisbon Lake6.7 miles away
- Trout Lake15 miles away
- Rynearson Flowage No. 118 miles away
- Eagle Nest Flowage (Potters)21 miles away
- Goose Pool24 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
See data sources for what each source covers, and about for how the numbers are matched to lakes.
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