Near Oroville, the 28,450 acre Lake Oroville State Recreation Area has large trail system.
To reach the mountain biking trailhead from Highway 70, go east on Highway 162 (Oroville Dam Blvd.). Continue on Oroville Dam Blvd., turning right at Olive Hwy. (Highway 162), proceed approximately 6 miles on Olive Highway to Kelly Ridge Road. Turn left and Kelly Ridge Road ends in the Visitor Center parking lot.
Overall, Lake Oroville State Recreation Area is the 90th most popular mountain bike trail of all 132 mountain biking rides in California.