Lake Thompson is South Dakota's second largest natural lake, covering over 15,000 acres with 44 miles of shoreline. Originally called Dry Woods Lake, it was transformed in the 1980s by heavy rains and snowmelt. The lake is designated as a U.S. National Natural Landmark.

Paddlers can access the lake via a boat ramp in the southern portion of the Lake Thompson Recreation Area. The recreation area offers 97 campsites with electrical hookups, providing a convenient base for multi-day paddling trips. Facilities include restrooms, showers, and a fish cleaning station.

The lake's large size allows for various paddling routes and experiences. The extensive shoreline offers ample exploration opportunities. Paddlers should be aware of potential high winds across the prairie landscape, which may affect paddling conditions.

Lake Thompson is known for its excellent fishing. Species include walleye, northern pike, perch, and silver bass. Wildlife viewing is another highlight, with hundreds of bird species visiting the lake year-round. Paddlers may spot sanderlings, Wilson's phalaropes, snow geese, and various duck species.

Water sports are popular on Lake Thompson, so paddlers should be alert for motorized boat traffic, especially during summer months. The lake features a protected swimming beach, indicating generally good water quality for recreation.

While the recreation area is open year-round, water services are unavailable from October to April. Summer temperatures typically reach the mid-80s, with up to three inches of rain per month. Winter brings significant snowfall and freezing temperatures, making paddling a seasonal activity on Lake Thompson.