WI · ranked by public data
18 Iron County lakes are at least 50 acres with a current DNR water-clarity reading, out of 222 documented lakes in the county. Updated July 2026.
Iron County, WI
16.5 ft water clarity (Jul 2024) · 79 acres, 88 ft max depth · 1 public landing
Iron County, WI
14 ft water clarity (Jul 2025) · 181 acres, 24 ft max depth · 1 public landing
Iron County, WI
12 ft water clarity (Apr 2026) · 155 acres, 21 ft max depth · 1 public landing
Iron County, WI
11 ft water clarity (Jun 2026) · 786 acres, 48 ft max depth · 1 public landing · DNR impairment listed
Iron County, WI
11 ft water clarity (Aug 2025) · 148 acres, 33 ft max depth · 1 public landing
Iron County, WI
10.5 ft water clarity (Sep 2025) · 441 acres, 21 ft max depth · 1 public landing
Iron County, WI
8.1 ft water clarity (Jul 2023) · 187 acres, 21 ft max depth · 1 public landing
Iron County, WI
8.1 ft water clarity (May 2025) · 65 acres, 39 ft max depth · 1 public landing
Iron County, WI
7.5 ft water clarity (Jul 2025) · 300 acres, 41 ft max depth · 1 public landing
Iron County, WI
7 ft water clarity (Jul 2026) · 297 acres, 23 ft max depth · No verified public access
| Rank | Lake | County | Water clarity | Acres | Max depth | Public access |
|---|---|---|---|---|---|---|
| 11 | Martha Lake | Iron | 7 ft | 146 | 55 ft | — |
| 12 | Spider Lakeimpaired | Iron | 6.5 ft | 359 | 49 ft | 1 landing |
| 13 | Turtle-Flambeau Flowageimpaired | Iron | 6 ft | 12,942 | 50 ft | 5 landings |
| 14 | Long Lake | Iron | 5 ft | 370 | 34 ft | — |
| 15 | Rice Lake | Iron | 5 ft | 114 | 21 ft | — |
| 16 | Pike Lake | Iron | 4.8 ft | 214 | 80 ft | — |
| 17 | Little Pike Lake | Iron | 4.5 ft | 96 | 20 ft | — |
| 18 | Island Lakeimpaired | Iron | 2.3 ft | 344 | 17 ft | 1 landing |
Methodology
FAQ
Hewitt Lake — By most recent Secchi reading, Hewitt Lake in Iron County is the clearest monitored lake in Iron County, with 16.5 feet of visibility.
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.