Northeast of Sacremento and Auburn, the 35,000 acre Auburn State Recreation Area has 26 mountain bike trails along 40-miles of the North and Middle Forks of the American river. Once teeming with thousands of gold miners, the area is now a natural area offering a wide variety of recreation opportunities to over 500,000 visitors a year. Most trails are shared by hikers, mountain bikers and equestrians. Generally, the park (which is 20 miles long on two forks of the American River) is situated south of Interstate 80, stretching from Auburn to Colfax. The main access is from Auburn, either on Highway 49 or the Auburn-Foresthill Road.
The Forest Hill Divide Loop trail is 10 miles of rolling, ridgeline singletrack. To reach the trailhead from Auburn, head northeast on US80 to Exit 126 (Foresthill Road). Head east on Foresthill Road for 6 miles to trailhead parking area near Upper Lake Day Use Area turnoff.
The Clementine Loop Trail is a technical route on decomposed granite bobbing and winding through patches of oak woodlands and grassy hillsides.
Overall, Foothills Divide Trail is the 8th most popular mountain bike trail of all 132 mountain biking rides in California.