Prineville Reservoir State Park's main boat ramp is the only ramp long enough to accommodate year-round launching, making it the most reliable access point during winter months when water levels fluctuate.

The day-use area features a paved ramp, ample parking, restrooms, a fish-cleaning station, an accessible fishing pier, and 32 boat moorages (seasonal), along with picnic facilities.

Additional boat ramps are available at Jasper Point, Crook County, Powderhouse Cove, and Roberts Bay East, though most are usable only between Memorial Day and Labor Day depending on water levels.