Mallalieu Lake

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 1974), 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 Oct 28, 2025. 200 readings on record, 2001 to 2025.

Typical summer clarity (June to September): 2.8 ft, low, from 93 readings (2012 to 2025).

Measured at the monitoring station named “LAKE MALLALIEU - DEEP HOLE”.

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 MALLALIEU - DEEP HOLE. Checked Oct 23, 2026.

Water temperature

62°F surface, measured Oct 13, 2026

Measured near the surface (0 m down). A single reading, not a daily value.

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.

Fish recorded near this lake

• Bigmouth Buffalo Ictiobus cyprinellus2001; 1 record
• Black Bullhead Ameiurus melas2001 to 2006; 3 records
• Black Crappie Pomoxis nigromaculatus1928 to 2006; 11 records
• Bluegill Lepomis macrochirus1928 to 2006; 11 records
• Bluntnose Minnow Pimephales notatus1928 to 2006; 6 records
• Brook Silverside Labidesthes sicculus2006; 1 record
• Brook Stickleback Culaea inconstans2001; 1 record
• Brook Trout Salvelinus fontinalis2001; 1 record
• Brown Trout Salmo trutta1999 to 2001; 4 records
• Central Mudminnow Umbra limi2001; 1 record
• Common Carp Cyprinus carpio1925 to 2006; 5 records
• Common Shiner Luxilus cornutus2001 to 2006; 3 records
• Emerald Shiner Notropis atherinoides2001 to 2006; 3 records
• Fathead Minnow Pimephales promelas2001; 1 record
• Gizzard Shad Dorosoma cepedianum2001 to 2006; 4 records
• Golden Redhorse Moxostoma erythrurum2006; 1 record
• Golden Shiner Notemigonus crysoleucas1928 to 2006; 7 records
• Hornyhead Chub Nocomis biguttatus2001; 2 records
• Iowa Darter Etheostoma exile2001; 1 record
• Johnny Darter Etheostoma nigrum1928 to 2006; 4 records
• Largemouth Bass Micropterus salmoides1928 to 2006; 12 records
• Logperch Percina caprodes1928 to 2006; 7 records
• Muskellunge Esox masquinongy2001; 2 records
• Northern Pike Esox lucius1999 to 2001; 4 records
• Pumpkinseed Lepomis gibbosus1999 to 2006; 10 records
• Quillback Carpiodes cyprinus2001; 1 record
• Rainbow Darter Etheostoma caeruleum2001; 1 record
• Rainbow Trout Oncorhynchus mykiss2001; 3 records
• Rock Bass Ambloplites rupestris2001 to 2006; 4 records
• Sauger Sander canadensis2001; 2 records
• Shorthead Redhorse Moxostoma macrolepidotum1928 to 2006; 5 records
• Silver Redhorse Moxostoma anisurum2001; 1 record
• Smallmouth Bass Micropterus dolomieu1995 to 2006; 10 records
• Smallmouth Buffalo Ictiobus bubalus2001; 1 record
• Spotfin Shiner Cyprinella spiloptera1928 to 2006; 2 records
• Spottail Shiner Notropis hudsonius2001 to 2006; 5 records
• Walleye Sander vitreus2001; 2 records
• White Bass Morone chrysops2001; 2 records
• White Sucker Catostomus commersonii2001 to 2006; 5 records
• Yellow Bullhead Ameiurus natalis2001 to 2006; 5 records
• Yellow Perch Perca flavescens1928 to 2006; 11 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 Mallalieu Boat Ramp (listed under St. Croix County)Boat ramp · Concrete Panels surface · City
  Directions

Wisconsin DNR public boat access sites. Checked Oct 23, 2026.

More lakes in St Croix County

• Little Falls Lake3.0 miles away
• Perch Lake4.9 miles away
• Dry Dam Lake6.4 miles away
• Bass Lake7.0 miles away
• Three Lakes8.2 miles away
• Twin Lakes8.7 miles away

All St Croix County lakes

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
• Measured temperatureWisconsin 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
• 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.