WI · ranked by public data

The 25 Deepest Lakes in Iron County, Wisconsin

31 Iron County lakes are at least 50 acres with a documented maximum depth, out of 222 documented lakes in the county. Updated July 2026.

188 ft
79 acres
Iron County, WI
Hewitt Lake
enhancedDepth mapWater dataDNR forecast
46.30, -89.9879 acres | 88 ft max1 public access pointLargemouth Bass, Musky
88 ft maximum depth · 79 acres · 1 public landing
280 ft
214 acres
Iron County, WI
Pike Lake
enhancedDepth mapStockedWater data
46.17, -90.12214 acres | 80 ft max0 public access pointsMusky, Northern Pike
80 ft maximum depth · 214 acres · No verified public access
355 ft
146 acres
Iron County, WI
Martha Lake
enhancedDepth mapStockedWater data
46.17, -90.03146 acres | 55 ft max0 public access pointsLargemouth Bass, Musky
55 ft maximum depth · 146 acres · No verified public access
450 ft
12,942 acres
Iron County, WI
Turtle-Flambeau Flowage
enhancedDepth mapStockedDNR impairmentWater data
46.07, -90.1412,942 acres | 50 ft max5 public access pointsNorthern Pike, Walleye
50 ft maximum depth · 12,942 acres · 5 public landings · DNR impairment listed
549 ft
359 acres
Iron County, WI
Spider Lake
enhancedDepth mapStockedDNR impairmentWater data
46.21, -90.03359 acres | 49 ft max1 public access pointMusky, Northern Pike
49 ft maximum depth · 359 acres · 1 public landing · DNR impairment listed
649 ft
129 acres
Iron County, WI
Owl Lake
enhancedDepth mapStockedDNR impairmentWater data
46.28, -89.97129 acres | 49 ft max1 public access pointPanfish, Largemouth Bass
49 ft maximum depth · 129 acres · 1 public landing · DNR impairment listed
748 ft
786 acres
Iron County, WI
Trude Lake
enhancedDepth mapStockedDNR impairmentWater dataDNR forecast
46.11, -90.15786 acres | 48 ft max1 public access pointNorthern Pike, Walleye
48 ft maximum depth · 786 acres · 1 public landing · DNR impairment listed
846 ft
90 acres
Iron County, WI
Crystal Lake
enhancedDepth mapWater data
46.17, -90.1190 acres | 46 ft max0 public access pointsLargemouth Bass, Panfish
46 ft maximum depth · 90 acres · No verified public access
941 ft
300 acres
Iron County, WI
Pine Lake
enhancedDepth mapWater data
46.26, -90.14300 acres | 41 ft max1 public access pointWalleye, Musky
41 ft maximum depth · 300 acres · 1 public landing
1039 ft
65 acres
Iron County, WI
Weber Lake
enhancedDepth mapStockedWater data
46.18, -90.1465 acres | 39 ft max1 public access pointLargemouth Bass, Panfish
39 ft maximum depth · 65 acres · 1 public landing

Rank	Lake	County	Max depth	Acres	Public access
11	Long Lake	Iron	34 ft	370	—
12	Grand Portage Lake	Iron	33 ft	148	1 landing
13	Bearskull Lakeimpaired	Iron	26 ft	81	1 landing
14	Echo Lake	Iron	25 ft	205	1 landing
15	Mercer Lake	Iron	24 ft	181	1 landing
16	Lake of the Falls	Iron	23 ft	297	—
17	Fisher Lake	Iron	21 ft	441	1 landing
18	Cedar Lake	Iron	21 ft	187	1 landing
19	Wilson Lake	Iron	21 ft	155	1 landing
20	Rice Lake	Iron	21 ft	114	—
21	Little Pike Lake	Iron	20 ft	96	—
22	McDermott Lake	Iron	19 ft	82	1 landing
23	Payment Lake	Iron	18 ft	65	—
24	Island Lakeimpaired	Iron	17 ft	344	1 landing
25	Boot Lake	Iron	16 ft	178	—

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

Iron County lake records

What is the deepest lake in Iron County?

Hewitt Lake — Hewitt Lake in Iron County is the deepest documented lake in Iron County, at 88 feet maximum depth.

Deepest lakes statewide Biggest lakes in Iron County Clearest lakes in Iron County Lakes with the most public access in Iron County All Iron 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 Iron County, Wisconsin

31 Iron County lakes are at least 50 acres with a documented maximum depth, out of 222 documented lakes in the county. Updated July 2026.

188 ft
79 acres
Iron County, WI
Hewitt Lake
enhancedDepth mapWater dataDNR forecast
46.30, -89.9879 acres | 88 ft max1 public access pointLargemouth Bass, Musky
88 ft maximum depth · 79 acres · 1 public landing
280 ft
214 acres
Iron County, WI
Pike Lake
enhancedDepth mapStockedWater data
46.17, -90.12214 acres | 80 ft max0 public access pointsMusky, Northern Pike
80 ft maximum depth · 214 acres · No verified public access
355 ft
146 acres
Iron County, WI
Martha Lake
enhancedDepth mapStockedWater data
46.17, -90.03146 acres | 55 ft max0 public access pointsLargemouth Bass, Musky
55 ft maximum depth · 146 acres · No verified public access
450 ft
12,942 acres
Iron County, WI
Turtle-Flambeau Flowage
enhancedDepth mapStockedDNR impairmentWater data
46.07, -90.1412,942 acres | 50 ft max5 public access pointsNorthern Pike, Walleye
50 ft maximum depth · 12,942 acres · 5 public landings · DNR impairment listed
549 ft
359 acres
Iron County, WI
Spider Lake
enhancedDepth mapStockedDNR impairmentWater data
46.21, -90.03359 acres | 49 ft max1 public access pointMusky, Northern Pike
49 ft maximum depth · 359 acres · 1 public landing · DNR impairment listed
649 ft
129 acres
Iron County, WI
Owl Lake
enhancedDepth mapStockedDNR impairmentWater data
46.28, -89.97129 acres | 49 ft max1 public access pointPanfish, Largemouth Bass
49 ft maximum depth · 129 acres · 1 public landing · DNR impairment listed
748 ft
786 acres
Iron County, WI
Trude Lake
enhancedDepth mapStockedDNR impairmentWater dataDNR forecast
46.11, -90.15786 acres | 48 ft max1 public access pointNorthern Pike, Walleye
48 ft maximum depth · 786 acres · 1 public landing · DNR impairment listed
846 ft
90 acres
Iron County, WI
Crystal Lake
enhancedDepth mapWater data
46.17, -90.1190 acres | 46 ft max0 public access pointsLargemouth Bass, Panfish
46 ft maximum depth · 90 acres · No verified public access
941 ft
300 acres
Iron County, WI
Pine Lake
enhancedDepth mapWater data
46.26, -90.14300 acres | 41 ft max1 public access pointWalleye, Musky
41 ft maximum depth · 300 acres · 1 public landing
1039 ft
65 acres
Iron County, WI
Weber Lake
enhancedDepth mapStockedWater data
46.18, -90.1465 acres | 39 ft max1 public access pointLargemouth Bass, Panfish
39 ft maximum depth · 65 acres · 1 public landing

Rank	Lake	County	Max depth	Acres	Public access
11	Long Lake	Iron	34 ft	370	—
12	Grand Portage Lake	Iron	33 ft	148	1 landing
13	Bearskull Lakeimpaired	Iron	26 ft	81	1 landing
14	Echo Lake	Iron	25 ft	205	1 landing
15	Mercer Lake	Iron	24 ft	181	1 landing
16	Lake of the Falls	Iron	23 ft	297	—
17	Fisher Lake	Iron	21 ft	441	1 landing
18	Cedar Lake	Iron	21 ft	187	1 landing
19	Wilson Lake	Iron	21 ft	155	1 landing
20	Rice Lake	Iron	21 ft	114	—
21	Little Pike Lake	Iron	20 ft	96	—
22	McDermott Lake	Iron	19 ft	82	1 landing
23	Payment Lake	Iron	18 ft	65	—
24	Island Lakeimpaired	Iron	17 ft	344	1 landing
25	Boot Lake	Iron	16 ft	178	—

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

Iron County lake records

What is the deepest lake in Iron County?

Hewitt Lake — Hewitt Lake in Iron County is the deepest documented lake in Iron County, at 88 feet maximum depth.

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

The 25 Deepest Lakes in Iron County, Wisconsin

Hewitt Lake

Pike Lake

Martha Lake

Turtle-Flambeau Flowage

Spider Lake

Owl Lake

Trude Lake

Crystal Lake

Pine Lake

Weber Lake

How this list is built

Iron County lake records

What is the deepest lake in Iron County?

The 25 Deepest Lakes in Iron County, Wisconsin

Hewitt Lake

Pike Lake

Martha Lake

Turtle-Flambeau Flowage

Spider Lake

Owl Lake

Trude Lake

Crystal Lake

Pine Lake

Weber Lake

How this list is built

Iron County lake records

What is the deepest lake in Iron County?