Natural inland lake

Lake Thumb

Charlevoix County, Michigan

Thumb Lake, also called Lake Louise, is a deep clear kettle lake near Boyne Falls in Charlevoix County. It is managed as a trout lake and stocked with splake and rainbow trout.

Air temp Loading current temperature…

Map data © OpenStreetMap contributors.

Current air temperature at Lake Thumb (National Weather Service) ↗

Surface area509 acres

Max depth152 ft

Shoreline—

Boat motorsCheck local rules

Species

Fishery rating out of 5.

Yellow Perch●●●●○

Schools on mud and sand flats. Great through the ice.

Rainbow Trout●●●○○

Stocked by the DNR.

Smallmouth Bass●●○○○

Rock, gravel and points. Tubes, jerkbaits and drop-shots.

Largemouth Bass●●○○○

Weeds, docks and wood in the shallows.

Bluegill●●○○○

Weed beds and shallow flats in late spring.

Boat launches

3 launch sites. Fees and hours change, so confirm before you go.

DNR boat launchRamp
South shore. Hard-surfaced ramp with parking for about 10 vehicles.Directions ↗
Public swimming beachPublic
East end of the lake.Directions ↗
More public accessPublic
See the Michigan DNR or lake website for all ramps and feesDirections ↗

Size & creel limits

Special rules for this lake, confirmed from official state regulations. Minimum size and daily limit.

Species	Min size	Daily limit
Rainbow Trout Type B trout lake rule from a 2009 DNR report. Only 3 of the 5 may be 15 in or longer. Confirm in the current digest.	12 in	5
Brown Trout Same Type B rule, 5 trout total, only 3 may be 15 in or longer. Splake follow it too.	12 in	5

Other species in this lake: look up the limits at Michigan Department of Natural Resources ↗

Verified October 2026. Rules change, so confirm current limits with the Michigan Department of Natural Resources before you fish.

Bait & tackle nearby

No shops listed yet for this lake. Use the search link below.

Search more bait shops near Lake Thumb ↗

Local tips

Trout hold deep in this lake, which reaches 152 feet in the east basin.
Rock bass and perch are plentiful and easy to catch near shore.
Splake are stocked every year, so they are legal to target under the trout lake rules.

View on interactive map

Zoom and pan on a street, satellite or terrain map. Red pins are boat launches.

More Michigan lakes

Torch Lake (Antrim County) Lake Charlevoix Burt Lake Mullett Lake Lake Gogebic Manistique Lake Black Lake Crystal Lake All Michigan lakes →

Always wear a life jacket and check your state's current regulations before you fish.