Gas up in Gilroy or Hollister... South on 25 Landmark: continue past Pinnacles Option: Old Herhandez Rd -- the river crossing might be tricky South onto Coalinga Rd. / Los Gatos Rd. Gas up in Coalinga West on 198 South onto Parkfield Grade South onto Cholame Valley Rd. West onto 41 for 2 miles South onto Bitterwater Rd. Landmark: continue past Gillis Canyan Rd Right/South onto Simmler-Bitterwater Rd. (Annette Rd continues straight/East) Bear right/South onto Bitterwater Rd (Bitterwatter Valley Rd to the left/East continues to Blackwells Corner) Left/East onto 58 ~ 6 miles Right/South onto Soda Lake Rd (through Carrizo Plain -- look for Antelope!) This turns to easy gravel for a dozen or so miles. Slow down for the 20 mph turn. You can overshoot because you are likely to pick up too much speed during the long straights. Gas up at intersection of Soda Lake Rd and 166. Right/West onto 166 for 1/2 mile Left/South onto Cerro Noroeste Rd. Left/East onto Cuddy Valley Rd. Left/East onto Frazier Mtn Park Rd. Right onto frontage road just before hwy 5 Cross under freeway at Gorman Get gas / take break, you'll probably need it South/East on Old Ridge Route on other side of hwy 5 Left/East onto 138 for 2 miles Right/South onto County N2 for 2 miles Bear Right/South onto Old Ridge Rd / Castaic Canyon Rd. -- this is a piece of the old Grapvine Road. Ride ends in Castaic. If you are going to Santa Monica or thereabouts, it might be better to take 33 South from 166 through Ojai and so on.