Mercer Lake Overview
Fishing Regulations in Mercer Lake
Special Fishing regulations: This lake has special fishing regulations that differ from statewide or border water regulations for those species identified below and take precedence. Regulations listed below are currently in place. Visit the fishing regulations page for links to upcoming regulations for specific lakes.
Special Waterbody Regulations
- Catch and release fishing for largemouth and smallmouth bass is open year round unless otherwise noted.
- Motor Trolling is allowed with 1 hook, bait, or lure per angler, and 3 hooks, baits, or lures maximum per boat.
Special Species Regulations
- Muskellunge and hybrids: May 25, 2024 to December 31, 2024: The minimum length limit is 40” and the daily bag limit is 1.
- Rough fish: Open All Year: No minimum length limit and the daily bag limit is unlimited.
- Round goby: Open All Year: The daily bag limit is 0, one may be killed and possessed for transport to a wdnr office.
- Ruffe: Open All Year: The daily bag limit is 0, one may be killed and possessed for transport to a wdnr office.
- Shovelnose sturgeon: Closed: No fishing allowed.
- Paddlefish: Closed: No fishing allowed.
- Lake sturgeon: Closed: No fishing allowed.
- Cisco and whitefish: Open All Year: No minimum length limit and the daily bag limit is 10.
- Northern pike: May 4, 2024 to March 2, 2025: No minimum length limit and the daily bag limit is 5.
- Bullheads: Open All Year: No minimum length limit and the daily bag limit is unlimited.
- Walleye, sauger, and hybrids: May 4, 2024 to March 2, 2025: The minimum length limit is 18” and the daily bag limit is 3.
- White perch: Open All Year: The daily bag limit is 0, one may be killed and possessed for transport to a wdnr office.
- Catfish: Open All Year: No minimum length limit and the daily bag limit is 10.
- Panfish: Open All Year: No minimum length limit and the daily bag limit is 25.
- Rock, yellow, and white bass: Open All Year: No minimum length limit and the daily bag limit is unlimited.
- Trout: See specific regulations: https://dnr.wisconsin.gov/topic/fishing/trout/.
- Largemouth bass and smallmouth bass: June 15, 2024 to March 2, 2025: The minimum length limit is 14” and the daily bag limit is 5.
- Largemouth bass: May 4, 2024 to June 14, 2024: The minimum length limit is 14” and the daily bag limit is 5.
- Smallmouth bass: May 4, 2024 to June 14, 2024: Fish may not be harvested (catch and release only).
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Fish Species
Mercer Lake Bluegill abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Mercer Lake Crappie abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Mercer Lake Largemouth bass abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Mercer Lake Muskellunge abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.| Survey Year | Largest Fish (in) |
|---|---|
| 2015 | 21 |
Mercer Lake Northern pike abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Mercer Lake Pumpkinseed abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Mercer Lake Rock bass abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Mercer Lake Smallmouth bass abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.Mercer Lake Walleye abundance
Average range for similar lakes
Abundance ratings are based on Catch Per Unit Effort (CPUE) measurements conducted by the MN DNR, and represent a snapshot of a species population at a given point in time.
Source: Minnesota Department of Natural Resources. Survey cadence may vary by state and water body.
