Thunder Bay Boat Ramp is one of several access points at Sherman Reservoir State Recreation Area in central Nebraska, offering boat launch facilities for the 2,845-acre reservoir.

The ramp has experienced water level fluctuations, with the east ramp periodically closing during low-water periods; check current conditions before visiting as water levels can vary seasonally.

A fish-cleaning station is available at the Trail 2 area near the main boat ramp parking lot for angler convenience.