Size
183ac
Boat Launch
Carry-in Launch
Toilet
No
Boat Dock
Species in Thunder Lake
Pumpkinseed
Largemouth bass
Bluegill
Perch
Smallmouth bass
Walleye
Crappie
Northern pike
Muskellunge
Rock bass
Overview
Fishing Hot Spots' home water! Muskie in both quantity and quality. Nice bass, northerns and panfish, but navigate with caution, since this is a flowage. Heavy recreational use prompts low-light fishing unless you find a hot bay.
Thunder Lake Map
Fishing Regulations
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 Species Regulations
- Bullheads: Open All Year: No minimum length limit and the daily bag limit is unlimited.
- Catfish: Open All Year: No minimum length limit and the daily bag limit is 10.
- Cisco And Whitefish: Open All Year: No minimum length limit and the daily bag limit is 10.
- Lake Sturgeon: Closed: No fishing allowed.
- Largemouth Bass And Smallmouth Bass: June 20, 2026 to March 7, 2027: The minimum length limit is 14” and the daily bag limit is 5.
- Largemouth Bass: May 2, 2026 to June 19, 2026: The minimum length limit is 14” and the daily bag limit is 5.
- Muskellunge And Hybrids: May 2, 2026 to December 31, 2026 on open water: The minimum length limit is 40” and the daily bag limit is 1.
- Northern Pike: May 2, 2026 to March 7, 2027: No minimum length limit and the daily bag limit is 5.
- Paddlefish: Closed: No fishing allowed.
- Panfish: Open All Year: No minimum length limit and the daily bag limit is 10.
- Rock, Yellow, And White Bass: Open All Year: No minimum length limit and the daily bag limit is unlimited.
- 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.
- Smallmouth Bass: May 2, 2026 to June 19, 2026: Fish may not be harvested (catch and release only).
- Trout: See specific regulations: See Trout Regulations
- Walleye, Sauger, And Hybrids: May 2, 2026 to March 7, 2027: The minimum length is 15”, but walleye, sauger, and hybrids from 20” to 24” may not be kept, and only 1 fish over 24” is allowed. 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.
Features
In 1882 the Rhinelander Flowage was formed when a mud and timber dam was constructed on the Wisconsin River to form a holding pond for lumber being floated down the river. At this time there were 8 sawmills in Rhinelander and the pond was named Boom Lake. By the early 1900’s the dam was rebuilt to generate power for the paper mill.
Today the Rhinelander Flowage is known as the Rhinelander Chain of Lakes. Considered one of the best fishing destinations of Northern Wisconsin and hosts the famous Hodag Muskie challenge. A diverse fishery for walleye, smallmouth bass, crappie, northern pike and muskies makes this body of water a favorite spot with local anglers. Although numbers of muskies can be caught here, the flowage is known more for its propensity to produce large muskies in the 40 plus pound class.
Forage
White sucker, juvenile perch and crappie make up the majority of the forage base.
Weather
73°Feels like 73°
--
58°
--58°--
--
9 mph
South
0 in
Rain
29.83 inHg
Falling
SaturdaySa
-- / 58°
SundaySu
81° / 60°
MondayMo
77° / 50°
TuesdayTu
60° / 41°
WednesdayWe
59° / 37°
ThursdayTh
59° / 38°
Moon Phase
October 11, 2026
1% Illumination
waxing crescent, getting brighter
SundaySu10/11
MondayMo10/12
TuesdayTu10/13
WednesdayWe10/14
ThursdayTh10/15
FridayFr10/16
SaturdaySa10/17
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Top Fish Species
Pumpkinseed
4-8 in
Length Range
6 in
Length Range
2023
Surveyed
Abundance (CPUE)
Understanding Abundance
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.Species Lengths
