Delton Lake
Sauk County, Wisconsin · WBIC 1295400
Size
267 acres
Max depth
16 ft
DNR lake type
Complex, Warm, dark water color
Water clarity
2 ft
Low, measured Sep 2025
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 1975), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
2 ft Secchi depthLow
Last measured Sep 27, 2025. 141 readings on record, 1993 to 2025.
Typical summer clarity (June to September): 2.4 ft, low, from 96 readings (2012 to 2025).
Measured at the monitoring station named “Lake Delton - Center of Lake”.
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 Lake Delton - Center of Lake. Checked Oct 23, 2026.
Water temperature
Last measured Sep 27, 2025, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 7 (Mar 30 to Apr 14)
- Surface reaches 48°Fabout Apr 20 (Apr 12 to Apr 26)
- Surface reaches 64°Fabout May 9 (May 6 to May 20)
- June surface76°F, usually 75 to 77°F
- July surface83°F, usually 80 to 83°F
- August surface77°F, usually 75 to 79°F
Forms a warm top layer around Jun 22, lasting about 38 days.
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.
Measured: Wisconsin DNR via the Water Quality Portal (checked Oct 23, 2026). 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 2025 (large fingerling, small fingerling and yearling); stocked in 13 years since 2010
- Fathead Minnowlast stocked 2024 (adult and yearling); stocked in 7 years since 2010
- Bluegilllast stocked 2015 (large fingerling); stocked in 4 years since 2010
- Northern Pikelast stocked 2013 (fry); stocked in 1 year since 2010
- Channel Catfishlast stocked 2010 (large fingerling); stocked in 1 year since 2010
- Largemouth Basslast stocked 2010 (large fingerling); stocked in 1 year since 2010
- Smallmouth Basslast stocked 2010 (yearling); stocked in 1 year 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 nigromaculatus2005; 3 records
- Bluegill Lepomis macrochirus2005; 3 records
- Bluntnose Minnow Pimephales notatus2005; 2 records
- Brook Stickleback Culaea inconstans2005; 1 record
- Common Carp Cyprinus carpio2005; 1 record
- Fathead Minnow Pimephales promelas2005; 1 record
- Freshwater Drum Aplodinotus grunniens2005; 1 record
- Gizzard Shad Dorosoma cepedianum2005; 2 records
- Golden Shiner Notemigonus crysoleucas2005; 2 records
- Johnny Darter Etheostoma nigrum2005; 1 record
- Largemouth Bass Micropterus salmoides2000 to 2005; 8 records
- Northern Pike Esox lucius2000 to 2003; 5 records
- Pumpkinseed Lepomis gibbosus2005; 3 records
- Smallmouth Bass Micropterus dolomieu2000 to 2005; 8 records
- Spotfin Shiner Cyprinella spiloptera2005; 1 record
- Walleye Sander vitreus2000 to 2005; 8 records
- White Bass Morone chrysops2000 to 2005; 3 records
- White Crappie Pomoxis annularis2005; 2 records
- White Sucker Catostomus commersonii2005; 1 record
- Yellow Bass Morone mississippiensis2003 to 2005; 3 records
- Yellow Bullhead Ameiurus natalis2005; 2 records
- Yellow Perch Perca flavescens2005; 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
- 1Lake Delton Canyon DriveBoat ramp · Concrete Panels surface · Accessible features · Village
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
Fishing from shore
- Lake Delton Fishing PierDirections · DNR details
Wisconsin DNR shore fishing sites. Checked Oct 24, 2026.
More lakes in Sauk County
- Lake of the Dells0.8 miles away
- Blass Lake1.4 miles away
- Mirror Lake2.6 miles away
- Virginia Lake8.9 miles away
- Seeley Lake12 miles away
- Devils Lake13 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
- 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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