MI · ranked by public data
5 Keweenaw County lakes are at least 50 state-mapped acres with an IFR-surveyed depth, out of 85 documented lakes in the county.
Keweenaw County, MI
70 ft maximum depth · 1,452 acres
Keweenaw County, MI
25 ft maximum depth · 56 acres
Keweenaw County, MI
15 ft maximum depth · 312 acres
Keweenaw County, MI
9 ft maximum depth · 208 acres
Keweenaw County, MI
5 ft maximum depth · 127 acres
Methodology
FAQ
Lake Gratiot — Lake Gratiot in Keweenaw County has the deepest recorded IFR survey point of any ranked Keweenaw County lake, at 70 feet — a historical DNR survey figure, not a modern re-survey.
Source data: Michigan DNR Institute for Fisheries Research historical lake surveys (largely mid-1900s; depths not re-confirmed by modern survey) and Michigan DNR GIS lake polygons, as aggregated by LakeList.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.