The Spring Valley Loop offers a ride on remote roads and trails with good views and abundant wildlife. Since the route serves as a cross country ski trail in winter, it offers the fat tire rider some interesting ups and downs too. Early in the ride you will pass Shoot 'Em Up Dick Tank where there is a handy little bench for a lunch stop.
The route then climbs to Eagle Rock Pass. The trail is rugged here for about a hundred yards. After the climb you can look forward to about a mile of downhill. The last part of the ride involves following the ski trail back through the ponderosa pines to the trailhead.
The Spring Valley mountain bike ride follows a course that in winter serves as a cross country ski tail so be sure to follow the diamonds marking the ski trail. The route itself includes everything from forest roads that have motorized traffic to narrow backcountry trials. There are a couple of long up hills and down hills along the ride, both have short steep sections. We advise you to carry your bike down off the pass near Eagle Rock. source: fs.usda.gov