The Highway 99 boat ramp provides access to the Frio River near Choke Canyon Lake with a large paved parking lot and paved ramp facilities.

This location is popular for kayaking and canoeing, though water levels can vary significantly—during low water periods, paddlers may need to carry kayaks approximately 50 feet to reach the water.

The ramp is free to use and offers a scenic entry point to the river's high banks and wildlife viewing opportunities.