Gavins Tailwaters South is a boat ramp located in South Dakota, USA. It is a concrete boat ramp that has a width of approximately 18 feet. The ramp provides access to the Missouri River, specifically the Gavins Point Tailwaters. This section of the river is immediately downstream of Gavins Point Dam, which is located near Yankton, South Dakota.

The Gavins Tailwaters South boat ramp is suitable for launching a variety of watercraft such as fishing boats, pontoon boats, kayaks, and canoes. The waterway itself is known for its excellent fishing opportunities, particularly for species such as walleye, sauger, and catfish.

The information stated above is accurate as of August 2021, as verified by various online sources such as the South Dakota Game, Fish, and Parks website and Google Maps. However, it's always best to check for any updates or changes in regulations before planning a visit to Gavins Tailwaters South or any other boat ramp.