Interstate 5 South for about 3 hours. Continue on I-5 South past Harris Ranch (the place with about 20,000 cows to the left (East) of I-5) Go under the high-tension wire towers.
Take Hwy. Rte. 198 towards Coalinga.
At the T-Intersection, take a left onto Coalinga Road (I think it is called 'Coalinga Road'. It may just be a continuation of Route 198) Turn right on Gale Ave.
Turn right on Derrick Road.
Turn left on Los Gatos Creek road.
Go about 30 miles until you see the BLM sign and kiosk for Clear Creek. Cross the river and turn right onto Clear Creek Road which will take you to the camping and staging areas. If you are going to the Quicksilver, you may only have to go about 24 miles or so (not 30 miles)