Spring Creek is a freestone stream flowing through the scenic Black Hills of South Dakota, spanning both Custer and Pennington Counties before ultimately joining the Cheyenne River near Creston. Rising on Odakota Mountain, this productive creek travels a considerable distance through varied terrain, creating a unique warm-water fishery that also supports cold-water species. The stream is dammed several times along its course, forming the sizeable Sheridan Lake. Below Sheridan Lake, the creek offers particularly suitable habitat for trout due to recent improvements in the dam's outflow system. Spring Creek is characterized by its fertile nature, producing substantial amounts of aquatic insects that provide excellent forage for fish. The stream flows through incredibly scenic areas, though not as a cascading mountain creek—instead, it has characteristics closer to a meandering meadow stream with some faster sections where it turns or narrows. When healthy, this creek supports an amazing population of aquatic invertebrates, resulting in some of the best hatches found on any Black Hills trout stream.