Fort Thompson Spillway Boat Ramp is a U. S. Army Corps of Engineers-managed access point located at river mile 987 on Lake Francis Case, featuring a ramp top elevation of 1370 feet and bottom elevation of 1340 feet.

The ramp provides boat access to the lower portion of the 107-mile reservoir, though users should be aware that water level fluctuations during the annual fall drawdown can significantly impact ramp usability.

This location is one of several public boat launch options along Lake Francis Case managed by either the Corps of Engineers or South Dakota Game, Fish and Parks.