Shadehill Reservoir

Water type: Artificial lake
Continent: North America
Climate: Continental

The reservoir has two main tributaries: the North Fork of the Grand River and the South Fork of the Grand River. The only outflowing river is the Grand River.

Fish species in the lake include walleye, smallmouth bass, channel catfish, yellow perch, northern pike, and common carp.

Shadehill Reservoir is the location of the Shadehill Recreation Area. Also nearby is the smaller Llewellyn Johns Recreation Area, both managed by the South Dakota Department of Game, Fish, and Parks. The recreation area includes facilities for camping, swimming, picnicking, and boating.

Also, around the reservoir is the Hugh Glass Lakeside Use Area, named after the mountain man Hugh Glass, which also serves as a free campground, boat launch, and picnic area. A historical monument to Hugh Glass is located near the site where he was attacked on the southern shore of Shadehill Reservoir, at the confluence of the Grand River.