Fishing in Iosco County, Michigan

What this local map set contains

The Iosco County directory currently covers 10 lakes or reservoirs. 10 charts use measured bathymetry from a published source; none rely on modeled contours. Recorded maximum depths range from 15 to 128 ft, with a median of 25 ft. Those figures describe each chart's deepest recorded or modeled point, not a safe navigation depth.

Species records are attached to 10 of 10 waters. The most frequently cataloged targets are Bluegill (10), Largemouth Bass (10), Smallmouth Bass (10), Yellow Perch (10) and Walleye (9). These are coverage counts, not abundance estimates or catch forecasts; open the individual map to see the evidence and seasonal context attached to that water.

Three useful maps to compare first

1. Marlbed Lake: 30 ft maximum; survey-backed contours; 14 cataloged target species.
2. Round Lake: 15 ft maximum; survey-backed contours; 14 cataloged target species.
3. Welcome Lake: 30 ft maximum; survey-backed contours; 13 cataloged target species.

Start with a survey-backed chart when exact contour shape matters most. Use a modeled chart as broad planning context, then verify depths on the water. Comparing the three examples above also shows whether this area offers one dominant basin type or genuinely different shallow, deep, lake and river options. Access is separate from map coverage: confirm launches, shore rights, closures and posted rules before making the trip.