St. Louis River-MN 23 to Duluth Harbor Professional Review and Guide
"In its final miles, the St. Louis spreads into a broad estuary containing backwaters and islands. From the dam downstream, the river spreads out into a broad estuary known initially as Spirit Lake and farther downstream as St. Louis Bay. At its mouth, the estuary forms the busy Lake Superior harbor of Duluth, Minnesota, and Superior, Wisconsin. Land surrounding the river rises in distant hills. The mouths of small tributary streams form channels for paddlers to explore.
The fishery of this stretch of the St. Louis includes smallmouth bass, walleye, northern pike, lake sturgeon, and even an occasionally muskie. A popular place to fish is the swift water below the Fond du Lac Dam."