Lower O'Brien Campground offers 10 first-come, first-served riverside campsites on the Salmon River in a lodgepole pine forest setting, with potable water and vault toilets available.

The campground provides excellent access for both anglers and paddlers, with nearby Warm Springs Creek Trail for hiking and a boat ramp at Yankee Fork offering 14 miles of Class III and IV rapids.

Note that the narrow dirt road is not suitable for large RVs, and occupancy is limited to 10 days within a 30-day period with no cell service in the area.