WI · ranked by public data

The 25 Biggest Lakes in Iron County, Wisconsin

31 Iron County lakes cover at least 50 acres, out of 222 documented lakes in the county. Updated July 2026.

112,942 ac
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
12,942 acres · 50 ft max depth · 5 public landings · DNR impairment listed
2786 ac
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
786 acres · 48 ft max depth · 1 public landing · DNR impairment listed
3441 ac
441 acres
Iron County, WI
Fisher Lake
enhancedDepth mapStockedWater data
46.24, -89.96441 acres | 21 ft max1 public access pointLargemouth Bass, Musky
441 acres · 21 ft max depth · 1 public landing
4370 ac
370 acres
Iron County, WI
Long Lake
enhancedDepth mapStockedWater data
46.27, -90.03370 acres | 34 ft max0 public access pointsMusky, Northern Pike
370 acres · 34 ft max depth · No verified public access
5359 ac
359 acres
Iron County, WI
Spider Lake
enhancedDepth mapStockedDNR impairmentWater data
46.21, -90.03359 acres | 49 ft max1 public access pointMusky, Northern Pike
359 acres · 49 ft max depth · 1 public landing · DNR impairment listed
6344 ac
344 acres
Iron County, WI
Island Lake
enhancedDepth mapStockedDNR impairmentWater data
46.27, -90.30344 acres | 17 ft max1 public access pointMusky, Northern Pike
344 acres · 17 ft max depth · 1 public landing · DNR impairment listed
7300 ac
300 acres
Iron County, WI
Pine Lake
enhancedDepth mapWater data
46.26, -90.14300 acres | 41 ft max1 public access pointWalleye, Musky
300 acres · 41 ft max depth · 1 public landing
8297 ac
297 acres
Iron County, WI
Lake of the Falls
enhancedDepth mapStockedWater data
46.16, -90.17297 acres | 23 ft max0 public access pointsMusky, Northern Pike
297 acres · 23 ft max depth · No verified public access
9250 ac
250 acres
Iron County, WI
Moose Lake
enhancedDepth map
46.23, -90.22250 acres | 12 ft max1 public access pointLargemouth Bass, Musky
250 acres · 12 ft max depth · 1 public landing
10214 ac
214 acres
Iron County, WI
Pike Lake
enhancedDepth mapStockedWater data
46.17, -90.12214 acres | 80 ft max0 public access pointsMusky, Northern Pike
214 acres · 80 ft max depth · No verified public access

Rank	Lake	County	Acres	Max depth	Public access
11	Echo Lake	Iron	205 ac	25 ft	1 landing
12	Cedar Lake	Iron	187 ac	21 ft	1 landing
13	Mercer Lake	Iron	181 ac	24 ft	1 landing
14	Boot Lake	Iron	178 ac	16 ft	—
15	Wilson Lake	Iron	155 ac	21 ft	1 landing
16	Grand Portage Lake	Iron	148 ac	33 ft	1 landing
17	Martha Lake	Iron	146 ac	55 ft	—
18	Lake Siximpaired	Iron	142 ac	15 ft	2 landings
19	Owl Lakeimpaired	Iron	129 ac	49 ft	1 landing
20	Randall Lake	Iron	115 ac	12 ft	1 landing
21	Rice Lake	Iron	114 ac	21 ft	—
22	Sandy Beach Lake	Iron	110 ac	13 ft	1 landing
23	Hay Lake	Iron	102 ac	5 ft	1 landing
24	Little Pike Lake	Iron	96 ac	20 ft	—
25	Crystal Lake	Iron	90 ac	46 ft	—

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

Iron County lake records

What is the biggest lake in Iron County?

Turtle-Flambeau Flowage — Turtle-Flambeau Flowage in Iron County is the biggest lake in Iron County, at 12,942 acres.

Biggest lakes statewide Deepest 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 Biggest Lakes in Iron County, Wisconsin

31 Iron County lakes cover at least 50 acres, out of 222 documented lakes in the county. Updated July 2026.

112,942 ac
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
12,942 acres · 50 ft max depth · 5 public landings · DNR impairment listed
2786 ac
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
786 acres · 48 ft max depth · 1 public landing · DNR impairment listed
3441 ac
441 acres
Iron County, WI
Fisher Lake
enhancedDepth mapStockedWater data
46.24, -89.96441 acres | 21 ft max1 public access pointLargemouth Bass, Musky
441 acres · 21 ft max depth · 1 public landing
4370 ac
370 acres
Iron County, WI
Long Lake
enhancedDepth mapStockedWater data
46.27, -90.03370 acres | 34 ft max0 public access pointsMusky, Northern Pike
370 acres · 34 ft max depth · No verified public access
5359 ac
359 acres
Iron County, WI
Spider Lake
enhancedDepth mapStockedDNR impairmentWater data
46.21, -90.03359 acres | 49 ft max1 public access pointMusky, Northern Pike
359 acres · 49 ft max depth · 1 public landing · DNR impairment listed
6344 ac
344 acres
Iron County, WI
Island Lake
enhancedDepth mapStockedDNR impairmentWater data
46.27, -90.30344 acres | 17 ft max1 public access pointMusky, Northern Pike
344 acres · 17 ft max depth · 1 public landing · DNR impairment listed
7300 ac
300 acres
Iron County, WI
Pine Lake
enhancedDepth mapWater data
46.26, -90.14300 acres | 41 ft max1 public access pointWalleye, Musky
300 acres · 41 ft max depth · 1 public landing
8297 ac
297 acres
Iron County, WI
Lake of the Falls
enhancedDepth mapStockedWater data
46.16, -90.17297 acres | 23 ft max0 public access pointsMusky, Northern Pike
297 acres · 23 ft max depth · No verified public access
9250 ac
250 acres
Iron County, WI
Moose Lake
enhancedDepth map
46.23, -90.22250 acres | 12 ft max1 public access pointLargemouth Bass, Musky
250 acres · 12 ft max depth · 1 public landing
10214 ac
214 acres
Iron County, WI
Pike Lake
enhancedDepth mapStockedWater data
46.17, -90.12214 acres | 80 ft max0 public access pointsMusky, Northern Pike
214 acres · 80 ft max depth · No verified public access

Rank	Lake	County	Acres	Max depth	Public access
11	Echo Lake	Iron	205 ac	25 ft	1 landing
12	Cedar Lake	Iron	187 ac	21 ft	1 landing
13	Mercer Lake	Iron	181 ac	24 ft	1 landing
14	Boot Lake	Iron	178 ac	16 ft	—
15	Wilson Lake	Iron	155 ac	21 ft	1 landing
16	Grand Portage Lake	Iron	148 ac	33 ft	1 landing
17	Martha Lake	Iron	146 ac	55 ft	—
18	Lake Siximpaired	Iron	142 ac	15 ft	2 landings
19	Owl Lakeimpaired	Iron	129 ac	49 ft	1 landing
20	Randall Lake	Iron	115 ac	12 ft	1 landing
21	Rice Lake	Iron	114 ac	21 ft	—
22	Sandy Beach Lake	Iron	110 ac	13 ft	1 landing
23	Hay Lake	Iron	102 ac	5 ft	1 landing
24	Little Pike Lake	Iron	96 ac	20 ft	—
25	Crystal Lake	Iron	90 ac	46 ft	—

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

Iron County lake records

What is the biggest lake in Iron County?

Turtle-Flambeau Flowage — Turtle-Flambeau Flowage in Iron County is the biggest lake in Iron County, at 12,942 acres.

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

The 25 Biggest Lakes in Iron County, Wisconsin

Turtle-Flambeau Flowage

Trude Lake

Fisher Lake

Long Lake

Spider Lake

Island Lake

Pine Lake

Lake of the Falls

Moose Lake

Pike Lake

How this list is built

Iron County lake records

What is the biggest lake in Iron County?

The 25 Biggest Lakes in Iron County, Wisconsin

Turtle-Flambeau Flowage

Trude Lake

Fisher Lake

Long Lake

Spider Lake

Island Lake

Pine Lake

Lake of the Falls

Moose Lake

Pike Lake

How this list is built

Iron County lake records

What is the biggest lake in Iron County?