Many anglers assume all trout in southeast Minnesota are stocked. This is not the case as many trout populations are sustained by natural reproduction.
The DNR will stock Rainbow, Brown or Brook Trout in certain stream sections for three reasons:
- To supplement the population of larger trout in heavily-fished streams
- To provide a trout fishery in streams where trout have good adult trout cover but poor reproductive success.
- To reintroduce trout into streams that may have once again sustainable trout habitat.
Although a few Rainbow Trout fingerlings are stocked, most Rainbow Trout are stocked as yearlings (9-12 inches). Brown Trout are stocked as fingerlings (2-3 inches) in late May and June. The Crystal Springs State Fish Hatchery (Altura), Peterson State Fish Hatchery (Peterson) and Lanesboro State Fish Hatchery (Lanesboro) supply most of the trout stocked in Minnesota.