WI · ranked by public data

The 25 Deepest Lakes in Bayfield County, Wisconsin

81 Bayfield County lakes are at least 50 acres with a documented maximum depth, out of 336 documented lakes in the county. Updated July 2026.

1105 ft
96 acres
Bayfield County, WI
Cisco Lake
enhancedDepth mapStockedAIS recordedWater data
46.36, -91.2596 acres | 105 ft max1 public access pointLargemouth Bass, Panfish
105 ft maximum depth · 96 acres · 1 public landing
295 ft
1,250 acres
Bayfield County, WI
Lake Owen
enhancedDepth mapStockedWater data
46.28, -91.231,250 acres | 95 ft max2 public access pointsNorthern Pike, Panfish
95 ft maximum depth · 1,250 acres · 2 public landings
392 ft
1,024 acres
Bayfield County, WI
Upper Eau Claire Lake
enhancedDepth mapStockedWater dataDNR forecast
46.31, -91.481,024 acres | 92 ft max1 public access pointLargemouth Bass, Northern Pike
92 ft maximum depth · 1,024 acres · 1 public landing
483 ft
322 acres
Bayfield County, WI
Diamond Lake
enhancedDepth mapStockedAIS recordedDNR impairmentWater data
46.26, -91.15322 acres | 83 ft max1 public access pointLargemouth Bass, Panfish
83 ft maximum depth · 322 acres · 1 public landing · DNR impairment listed
580 ft
170 acres
Bayfield County, WI
Atkins Lake
enhancedDepth mapStockedWater data
46.28, -91.04170 acres | 80 ft max1 public access pointSmallmouth Bass, Northern Pike
80 ft maximum depth · 170 acres · 1 public landing
677 ft
69 acres
Bayfield County, WI
Perch Lake
enhancedDepth mapStockedWater data
46.54, -91.3969 acres | 77 ft max1 public access pointLargemouth Bass, Trout
77 ft maximum depth · 69 acres · 1 public landing
766 ft
880 acres
Bayfield County, WI
Middle Eau Claire Lake
enhancedDepth mapStockedWater data
46.30, -91.52880 acres | 66 ft max1 public access pointLargemouth Bass, Northern Pike
66 ft maximum depth · 880 acres · 1 public landing
866 ft
63 acres
Bayfield County, WI
Hildur Lake
enhancedDepth map
46.49, -91.3463 acres | 66 ft max1 public access pointLargemouth Bass, Northern Pike
66 ft maximum depth · 63 acres · 1 public landing
959 ft
157 acres
Bayfield County, WI
Twin Bear Lake
enhancedDepth mapStockedWater data
46.51, -91.37157 acres | 59 ft max1 public access pointLargemouth Bass, Panfish
59 ft maximum depth · 157 acres · 1 public landing
1055 ft
190 acres
Bayfield County, WI
Bony Lake
enhancedDepth mapWater data
46.32, -91.51190 acres | 55 ft max0 public access pointsLargemouth Bass, Northern Pike
55 ft maximum depth · 190 acres · No verified public access

Rank	Lake	County	Max depth	Acres	Public access
11	Hart Lake	Bayfield	54 ft	257	—
12	Lake Millicent	Bayfield	53 ft	183	—
13	Eagle Lake	Bayfield	52 ft	163	—
14	Namekagon Lake	Bayfield	51 ft	2,897	8 landings
15	Buskey Bay	Bayfield	51 ft	88	1 landing
16	Island Lake	Bayfield	51 ft	63	1 landing
17	Star Lake	Bayfield	50 ft	207	1 landing
18	Northeast Lake	Bayfield	50 ft	88	—
19	George Lake	Bayfield	50 ft	50	1 landing
20	Sand Bar Lake	Bayfield	49 ft	127	—
21	Drummond Lake	Bayfield	49 ft	97	2 landings
22	Hammil Lake	Bayfield	47 ft	77	—
23	Bellevue Lake	Bayfield	45 ft	63	1 landing
24	Cable Lake	Bayfield	43 ft	159	1 landing
25	Bass Lake	Bayfield	43 ft	81	1 landing

Methodology

How this list is built

Ranked strictly by documented maximum depth from DNR lake records. No estimates, no hearsay depths.
Lakes without a documented maximum depth are excluded rather than guessed at.
Lakes under 50 acres — or without documented acreage — are excluded from rankings.
Public access is shown for every lake but never affects the ranking — a deep lake ranks whether or not you can launch on it.

FAQ

Bayfield County lake records

What is the deepest lake in Bayfield County?

Cisco Lake — Cisco Lake in Bayfield County is the deepest documented lake in Bayfield County, at 105 feet maximum depth.

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

Source data: Wisconsin DNR lake and monitoring records as aggregated by LakeList. Figures reflect the most recent documented values, not new surveys — 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 25 Deepest Lakes in Bayfield County, Wisconsin

81 Bayfield County lakes are at least 50 acres with a documented maximum depth, out of 336 documented lakes in the county. Updated July 2026.

1105 ft
96 acres
Bayfield County, WI
Cisco Lake
enhancedDepth mapStockedAIS recordedWater data
46.36, -91.2596 acres | 105 ft max1 public access pointLargemouth Bass, Panfish
105 ft maximum depth · 96 acres · 1 public landing
295 ft
1,250 acres
Bayfield County, WI
Lake Owen
enhancedDepth mapStockedWater data
46.28, -91.231,250 acres | 95 ft max2 public access pointsNorthern Pike, Panfish
95 ft maximum depth · 1,250 acres · 2 public landings
392 ft
1,024 acres
Bayfield County, WI
Upper Eau Claire Lake
enhancedDepth mapStockedWater dataDNR forecast
46.31, -91.481,024 acres | 92 ft max1 public access pointLargemouth Bass, Northern Pike
92 ft maximum depth · 1,024 acres · 1 public landing
483 ft
322 acres
Bayfield County, WI
Diamond Lake
enhancedDepth mapStockedAIS recordedDNR impairmentWater data
46.26, -91.15322 acres | 83 ft max1 public access pointLargemouth Bass, Panfish
83 ft maximum depth · 322 acres · 1 public landing · DNR impairment listed
580 ft
170 acres
Bayfield County, WI
Atkins Lake
enhancedDepth mapStockedWater data
46.28, -91.04170 acres | 80 ft max1 public access pointSmallmouth Bass, Northern Pike
80 ft maximum depth · 170 acres · 1 public landing
677 ft
69 acres
Bayfield County, WI
Perch Lake
enhancedDepth mapStockedWater data
46.54, -91.3969 acres | 77 ft max1 public access pointLargemouth Bass, Trout
77 ft maximum depth · 69 acres · 1 public landing
766 ft
880 acres
Bayfield County, WI
Middle Eau Claire Lake
enhancedDepth mapStockedWater data
46.30, -91.52880 acres | 66 ft max1 public access pointLargemouth Bass, Northern Pike
66 ft maximum depth · 880 acres · 1 public landing
866 ft
63 acres
Bayfield County, WI
Hildur Lake
enhancedDepth map
46.49, -91.3463 acres | 66 ft max1 public access pointLargemouth Bass, Northern Pike
66 ft maximum depth · 63 acres · 1 public landing
959 ft
157 acres
Bayfield County, WI
Twin Bear Lake
enhancedDepth mapStockedWater data
46.51, -91.37157 acres | 59 ft max1 public access pointLargemouth Bass, Panfish
59 ft maximum depth · 157 acres · 1 public landing
1055 ft
190 acres
Bayfield County, WI
Bony Lake
enhancedDepth mapWater data
46.32, -91.51190 acres | 55 ft max0 public access pointsLargemouth Bass, Northern Pike
55 ft maximum depth · 190 acres · No verified public access

Rank	Lake	County	Max depth	Acres	Public access
11	Hart Lake	Bayfield	54 ft	257	—
12	Lake Millicent	Bayfield	53 ft	183	—
13	Eagle Lake	Bayfield	52 ft	163	—
14	Namekagon Lake	Bayfield	51 ft	2,897	8 landings
15	Buskey Bay	Bayfield	51 ft	88	1 landing
16	Island Lake	Bayfield	51 ft	63	1 landing
17	Star Lake	Bayfield	50 ft	207	1 landing
18	Northeast Lake	Bayfield	50 ft	88	—
19	George Lake	Bayfield	50 ft	50	1 landing
20	Sand Bar Lake	Bayfield	49 ft	127	—
21	Drummond Lake	Bayfield	49 ft	97	2 landings
22	Hammil Lake	Bayfield	47 ft	77	—
23	Bellevue Lake	Bayfield	45 ft	63	1 landing
24	Cable Lake	Bayfield	43 ft	159	1 landing
25	Bass Lake	Bayfield	43 ft	81	1 landing

Methodology

How this list is built

Ranked strictly by documented maximum depth from DNR lake records. No estimates, no hearsay depths.
Lakes without a documented maximum depth are excluded rather than guessed at.
Lakes under 50 acres — or without documented acreage — are excluded from rankings.
Public access is shown for every lake but never affects the ranking — a deep lake ranks whether or not you can launch on it.

FAQ

Bayfield County lake records

What is the deepest lake in Bayfield County?

Cisco Lake — Cisco Lake in Bayfield County is the deepest documented lake in Bayfield County, at 105 feet maximum depth.

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

The 25 Deepest Lakes in Bayfield County, Wisconsin

Cisco Lake

Lake Owen

Upper Eau Claire Lake

Diamond Lake

Atkins Lake

Perch Lake

Middle Eau Claire Lake

Hildur Lake

Twin Bear Lake

Bony Lake

How this list is built

Bayfield County lake records

What is the deepest lake in Bayfield County?

The 25 Deepest Lakes in Bayfield County, Wisconsin

Cisco Lake

Lake Owen

Upper Eau Claire Lake

Diamond Lake

Atkins Lake

Perch Lake

Middle Eau Claire Lake

Hildur Lake

Twin Bear Lake

Bony Lake

How this list is built

Bayfield County lake records

What is the deepest lake in Bayfield County?