I've never been here but Mulholland Drive and Latigo Canyon Rd. seem to be pretty famous motorcycle roads down here. From Santa Barbara it looks like you take 101 South about 60 miles to Kanan Rd exit (Exit 36) past Thousand Oaks, Turn Right, Go 3 miles and turn left onto Sierra Creek Rd. Follow that until it hits Mulholland Hwy. Turn Right and in 0.3 miles you're at the Rock Store.

It looks like that if you keep following Mulholland then you'll immediately hit some fun twisties until you hit Kenan Rd (N9) again. If you turn left onto Kenan and follow it about 0.6 miles you can turn left onto Latigo Canyon Rd. and have some more fun.

External Links:
rock-store.com - links to Articles about the Rock Store
youtube.com - Ride down Mulholland
bikerstuff.com - More pics