Caldron Falls Reservoir
Marinette County, Wisconsin · WBIC 545400
This lake has fishing rules that differ from the standard ones for its area. Check the official rules before you fish. Official regulations
Size
1,018 acres
Max depth
40 ft
DNR lake type
Complex, Riverine
Water clarity
5.5 ft
Moderate, measured Sep 2024
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 1991), so the shape is approximate and a landing can sit a little off the shore. Open the DNR lake map.
Water clarity
5.5 ft Secchi depthModerate
Last measured Sep 20, 2024. 80 readings on record, 1993 to 2024.
Typical summer clarity (June to September): 5 ft, moderate, from 24 readings (2012 to 2024).
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 CALDRON FALLS RESERVOIR - DEEP HOLE. Checked Oct 23, 2026.
Water temperature
Last measured Sep 20, 2024, too long ago to show as the current temperature.
A typical year Modeled estimate
- Ice goes outabout Apr 14 (Apr 1 to Apr 21)
- Surface reaches 48°Fabout Apr 29 (Apr 20 to May 5)
- Surface reaches 64°Fabout May 24 (May 16 to May 29)
- June surface73°F, usually 71 to 75°F
- July surface79°F, usually 77 to 80°F
- August surface75°F, usually 73 to 76°F
Forms a warm top layer around Jun 2, lasting about 115 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 and small fingerling); stocked in 8 years since 2010
- Muskellungelast stocked 2024 (large fingerling); stocked in 11 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 Bullhead Ameiurus melas2005 to 2006; 3 records
- Black Crappie Pomoxis nigromaculatus1982 to 2006; 11 records
- Blackchin Shiner Notropis heterodon2005; 1 record
- Blackside Darter Percina maculata2005; 1 record
- Bluegill Lepomis macrochirus1960 to 2006; 16 records
- Bluntnose Minnow Pimephales notatus2003 to 2005; 3 records
- Brown Trout Salmo trutta1982; 1 record
- Common Carp Cyprinus carpio1972 to 1982; 3 records
- Common Shiner Luxilus cornutus2005; 1 record
- Creek Chub Semotilus atromaculatus2006; 1 record
- Golden Shiner Notemigonus crysoleucas1969 to 2006; 7 records
- Johnny Darter Etheostoma nigrum2003 to 2005; 2 records
- Largemouth Bass Micropterus salmoides1964 to 2006; 17 records
- Muskellunge Esox masquinongy1960 to 2006; 20 records
- Northern Hog Sucker Hypentelium nigricans2006; 2 records
- Northern Pike Esox lucius1963 to 2006; 20 records
- Pumpkinseed Lepomis gibbosus1982 to 2006; 12 records
- Rock Bass Ambloplites rupestris1969 to 2006; 13 records
- Smallmouth Bass Micropterus dolomieu1982 to 2006; 9 records
- Walleye Sander vitreus1982 to 2006; 11 records
- White Sucker Catostomus commersonii2003 to 2006; 2 records
- Yellow Bullhead Ameiurus natalis2003 to 2006; 4 records
- Yellow Perch Perca flavescens1963 to 2006; 15 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
- 1Boat Launch #8 - Caldron BayBoat ramp · Concrete Plank surface · Accessible features · State(dnr)
Directions - 2Boat Launch #9 - Muskellunge PointBoat ramp · Concrete Panels surface · Accessible features · State(dnr)
Directions - 3Boat Launch #13 - South BayBoat ramp · Concrete Panels surface · Accessible features · State(dnr)
Directions - 4Boat Launch #10 - North BayBoat ramp · Gravel surface · State(dnr)
Directions - 5Boat Launch #11 - Crandall CreekBoat ramp · Concrete Plank surface · State(dnr)
Directions
Wisconsin DNR public boat access sites. Checked Oct 23, 2026.
Fishing from shore
- Governor Thompson State Park Fishing PierDirections · DNR details
Wisconsin DNR shore fishing sites. Checked Oct 24, 2026.
More lakes in Marinette County
- Balsam Lake0.7 miles away
- Huber Lake1.7 miles away
- Frieda Lake2.4 miles away
- Crandall Lake3.1 miles away
- Mountain Lake3.4 miles away
- Harwell Lake4.1 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
- 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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