Fishing in Marshall County, South Dakota

What this local map set contains

The Marshall County directory currently covers 7 lakes or reservoirs. No chart in this set currently has measured bathymetry; 7 charts are clearly labeled as modeled. Recorded maximum depths range from 10 to 23 ft, with a median of 20 ft. Those figures describe each chart's deepest recorded or modeled point, not a safe navigation depth.

Species records are attached to 7 of 7 waters. The most frequently cataloged targets are Bluegill (7), Crappie (7), Northern Pike (7), Walleye (7) and Yellow Perch (7). 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. Opitz Lake: 23 ft maximum; modeled contours; 11 cataloged target species.
2. Roy Lake: 21 ft maximum; modeled contours; 11 cataloged target species.
3. Clear Lake: 20 ft maximum; modeled contours; 10 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.