Monument Hill Boat Ramp at Thermalito Afterbay features a two-lane boat ramp with a floating dock on the eastern shoreline, plus a day-use area with 10 picnic tables, 9 BBQs, fish cleaning station, and swimming beach.

Parking includes 10 single-vehicle spaces and 39 vehicle/trailer combination spaces (with ADA-accessible options), plus an additional graded gravel lot accommodating 30-40 vehicles with trailers.

No-wake speed limits before and after sunset make this an ideal access point for peaceful paddling and fishing on the 4,300-acre Afterbay.