Reservoir (Wisconsin River impoundment)

Lake DuBay

Portage / Marathon, Wisconsin

Lake DuBay is a Wisconsin River flowage in Portage and Marathon counties, listed by WDNR at 4,649 acres with a maximum depth of 30 feet. WDNR lists walleye as abundant, and panfish, smallmouth bass and northern pike as common.

Air temp in Mosinee, WI Loading current temperature…

Map data © OpenStreetMap contributors.

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

Surface area4,649 acres

Max depth30 ft

Shoreline42.3 mi

Boat motorsCheck local ordinances

Species

Fishery rating out of 5.

Walleye●●●●○

Listed as abundant by WDNR

Northern Pike●●●○○

Listed as common by WDNR

Smallmouth Bass●●●○○

Listed as common by WDNR

Bluegill●●●○○

Panfish listed as common

Crappie●●●○○

Panfish listed as common

Yellow Perch●●●○○

Panfish listed as common

Largemouth Bass●●○○○

Listed as present by WDNR

Muskellunge●●○○○

Listed as present by WDNR

Boat launches

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

DuBay County Park boat landingPublic
Campground ramp; ramp fee required (day or season pass, also valid at Galecke Park)Directions ↗
Lake DuBay public boat landingsPublic
WDNR lists 4 public landingsDirections ↗
More public accessPublic
See the WDNR lake page for all landingsDirections ↗

Size & creel limits

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

Species	Min size	Daily limit
Walleye 20-28 in protected; only 1 over 28 in; open all year	15 in	3 / day
Largemouth/Smallmouth Bass Open all year	14 in	5 / day
Northern Pike Open all year	See Wisconsin rules book ↗	5 / day
Muskellunge May 2 to Dec 31, 2026; open water only	50 in	1 / day
Panfish Open all year	See Wisconsin rules book ↗	10 / day
Catfish Open all year	See Wisconsin rules book ↗	10 / day
Trout See specific trout regulations	Varies	Varies

Other species in this lake: look up the limits at Wisconsin DNR ↗

Verified October 2026. Rules change, so confirm current limits with the Wisconsin DNR before you fish.

Bait & tackle nearby

Closest shops to the lake and its boat launches. Call ahead for live bait and hours.

Jr's Tackle & Bait ShopNearby
209620 County Road O, Mosinee, WI 54455(715) 693-0827 Directions ↗
Plover Bait CoNearby
4620 Coolidge Ave, Plover, WI 54467(715) 344-6352 Directions ↗
Bobber Down Live Bait & TackleNearby
3411 Johnson Ave, Plover, WI 54467(715) 344-0149 Directions ↗

Search more bait shops near Lake DuBay ↗

Local tips

Fish current breaks, points and old river channel edges
Walleye typically hold near structure and dam-area flats; check seasonal patterns
Check WDNR for current regulations before keeping fish

View on interactive map

Zoom and pan on a street, satellite or terrain map. Red pins are boat launches; blue pins are bait shops nearby.

More Wisconsin lakes

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