Sixmile Lake (South Dakota)

Sixmile Lake is a natural lake located in Clark County, South Dakota, United States. It is part of the larger watershed of the Big Sioux River. The lake is situated approximately six miles (9.7 km) southwest of the city of Clark.

The lake's primary use is for recreational purposes, including fishing, boating, and waterfowl hunting. Common fish species found in Sixmile Lake include walleye, northern pike, yellow perch, and various panfish. The South Dakota Department of Game, Fish and Parks manages the lake and surrounding area, overseeing fishing regulations, stocking programs, and habitat management to maintain the lake's ecological health and recreational value.

The lake's shoreline is primarily composed of grassland and agricultural land. Water levels in Sixmile Lake can fluctuate depending on precipitation and seasonal runoff. The lake's size is variable but is generally several hundred acres. Conservation efforts are ongoing to protect the lake from nutrient runoff and sedimentation, which are common threats to shallow prairie lakes in the region. Public access is available, including boat ramps and designated fishing areas.