WI · ranked by public data

The 10 Biggest Lakes in Marathon County, Wisconsin

10 Marathon County lakes cover at least 50 acres, out of 69 documented lakes in the county. Updated July 2026.

16,348 ac
6,348 acres
Marathon County, WI
Big Eau Pleine Reservoir
enhancedDepth mapWater data
44.75, -89.876,348 acres | 46 ft max12 public access pointsWalleye, Northern Pike
6,348 acres · 46 ft max depth · 12 public landings
21,851 ac
1,851 acres
Marathon County, WI
Lake Wausau
enhancedDepth mapWater dataDNR forecast
44.92, -89.631,851 acres | 30 ft max4 public access pointsPanfish, Northern Pike
1,851 acres · 30 ft max depth · 4 public landings
3204 ac
204 acres
Marathon County, WI
Pike Lake
enhancedDepth mapWater data
44.81, -89.35204 acres | 34 ft max1 public access pointPanfish, Largemouth Bass
204 acres · 34 ft max depth · 1 public landing
4184 ac
184 acres
Marathon County, WI
Eau Claire Flowage
enhancedDepth mapWater data
44.92, -89.61184 acres | 10 ft max1 public access pointNorthern Pike, Panfish
184 acres · 10 ft max depth · 1 public landing
5177 ac
177 acres
Marathon County, WI
Big Bass Lake
enhancedDepth mapWater data
44.72, -89.43177 acres | 13 ft max1 public access pointPanfish, Largemouth Bass
177 acres · 13 ft max depth · 1 public landing
6104 ac
104 acres
Marathon County, WI
Mission Lake
enhancedDepth mapWater data
44.78, -89.35104 acres | 26 ft max1 public access pointPanfish, Largemouth Bass
104 acres · 26 ft max depth · 1 public landing
799 ac
99 acres
Marathon County, WI
Mayflower Lake
enhancedDepth mapStockedWater data
44.91, -89.2699 acres | 16 ft max1 public access pointLargemouth Bass, Northern Pike
99 acres · 16 ft max depth · 1 public landing
896 ac
96 acres
Marathon County, WI
Norrie Lake
enhancedDepth mapStockedWater data
44.88, -89.2696 acres | 19 ft max1 public access pointPanfish, Largemouth Bass
96 acres · 19 ft max depth · 1 public landing
969 ac
69 acres
Marathon County, WI
Mud Lake
enhancedDepth mapStocked
44.92, -89.2969 acres | 17 ft max1 public access pointLargemouth Bass, Panfish
69 acres · 17 ft max depth · 1 public landing
1056 ac
56 acres
Marathon County, WI
Stenson Lake
availableDepth map
44.71, -89.2756 acres | 22 ft max0 public access pointsSpecies pending
56 acres · 22 ft max depth · No verified public access

Methodology

How this list is built

Ranked strictly by documented surface acres from DNR lake records.
Flowages and reservoirs count — they are lakes in the DNR's books, and some of the state's biggest water is impounded.
Lakes without documented acreage are excluded rather than estimated.
Lakes under 50 acres — or without documented acreage — are excluded from rankings.
Public access is shown for every lake but never affects the ranking.

FAQ

Marathon County lake records

What is the biggest lake in Marathon County?

Big Eau Pleine Reservoir — Big Eau Pleine Reservoir in Marathon County is the biggest lake in Marathon County, at 6,348 acres.

Biggest lakes statewide Deepest lakes in Marathon County Clearest lakes in Marathon County Lakes with the most public access in Marathon County All Marathon County lakes

Source data: Wisconsin DNR lake and monitoring records as aggregated by LakeList. Figures reflect the most recent documented values, not new surveys, and conditions change — verify access and rules before you go.Lake outlines are shoreline shapes from LakeList and the USGS National Hydrography Dataset; they illustrate a lake's form and are not depth or navigation charts.

WI · ranked by public data

The 10 Biggest Lakes in Marathon County, Wisconsin

10 Marathon County lakes cover at least 50 acres, out of 69 documented lakes in the county. Updated July 2026.

16,348 ac
6,348 acres
Marathon County, WI
Big Eau Pleine Reservoir
enhancedDepth mapWater data
44.75, -89.876,348 acres | 46 ft max12 public access pointsWalleye, Northern Pike
6,348 acres · 46 ft max depth · 12 public landings
21,851 ac
1,851 acres
Marathon County, WI
Lake Wausau
enhancedDepth mapWater dataDNR forecast
44.92, -89.631,851 acres | 30 ft max4 public access pointsPanfish, Northern Pike
1,851 acres · 30 ft max depth · 4 public landings
3204 ac
204 acres
Marathon County, WI
Pike Lake
enhancedDepth mapWater data
44.81, -89.35204 acres | 34 ft max1 public access pointPanfish, Largemouth Bass
204 acres · 34 ft max depth · 1 public landing
4184 ac
184 acres
Marathon County, WI
Eau Claire Flowage
enhancedDepth mapWater data
44.92, -89.61184 acres | 10 ft max1 public access pointNorthern Pike, Panfish
184 acres · 10 ft max depth · 1 public landing
5177 ac
177 acres
Marathon County, WI
Big Bass Lake
enhancedDepth mapWater data
44.72, -89.43177 acres | 13 ft max1 public access pointPanfish, Largemouth Bass
177 acres · 13 ft max depth · 1 public landing
6104 ac
104 acres
Marathon County, WI
Mission Lake
enhancedDepth mapWater data
44.78, -89.35104 acres | 26 ft max1 public access pointPanfish, Largemouth Bass
104 acres · 26 ft max depth · 1 public landing
799 ac
99 acres
Marathon County, WI
Mayflower Lake
enhancedDepth mapStockedWater data
44.91, -89.2699 acres | 16 ft max1 public access pointLargemouth Bass, Northern Pike
99 acres · 16 ft max depth · 1 public landing
896 ac
96 acres
Marathon County, WI
Norrie Lake
enhancedDepth mapStockedWater data
44.88, -89.2696 acres | 19 ft max1 public access pointPanfish, Largemouth Bass
96 acres · 19 ft max depth · 1 public landing
969 ac
69 acres
Marathon County, WI
Mud Lake
enhancedDepth mapStocked
44.92, -89.2969 acres | 17 ft max1 public access pointLargemouth Bass, Panfish
69 acres · 17 ft max depth · 1 public landing
1056 ac
56 acres
Marathon County, WI
Stenson Lake
availableDepth map
44.71, -89.2756 acres | 22 ft max0 public access pointsSpecies pending
56 acres · 22 ft max depth · No verified public access

Methodology

How this list is built

Ranked strictly by documented surface acres from DNR lake records.
Flowages and reservoirs count — they are lakes in the DNR's books, and some of the state's biggest water is impounded.
Lakes without documented acreage are excluded rather than estimated.
Lakes under 50 acres — or without documented acreage — are excluded from rankings.
Public access is shown for every lake but never affects the ranking.

FAQ

Marathon County lake records

What is the biggest lake in Marathon County?

Big Eau Pleine Reservoir — Big Eau Pleine Reservoir in Marathon County is the biggest lake in Marathon County, at 6,348 acres.

Biggest lakes statewide Deepest lakes in Marathon County Clearest lakes in Marathon County Lakes with the most public access in Marathon County All Marathon County lakes

The 10 Biggest Lakes in Marathon County, Wisconsin

Big Eau Pleine Reservoir

Lake Wausau

Pike Lake

Eau Claire Flowage

Big Bass Lake

Mission Lake

Mayflower Lake

Norrie Lake

Mud Lake

Stenson Lake

How this list is built

Marathon County lake records

What is the biggest lake in Marathon County?

The 10 Biggest Lakes in Marathon County, Wisconsin

Big Eau Pleine Reservoir

Lake Wausau

Pike Lake

Eau Claire Flowage

Big Bass Lake

Mission Lake

Mayflower Lake

Norrie Lake

Mud Lake

Stenson Lake

How this list is built

Marathon County lake records

What is the biggest lake in Marathon County?