Velkommen! Welcome aboard the RoadTrip America Forums!

A month is a fairly good time span to see the area you'll be traveling through. As for specific places to stop between Los Angeles and San Francisco, if you're taking the Pacific Coast Highway, I'd recommend either San Luis Obispo if you get out of L.A. late in the day, or Cambria if you get going a little earlier. But Grand Canyon Caverns (Peach Springs) to Los Angeles is only 400 miles (640 km), so you should really be able to do that in a day unless you are going some really circuitous route. But if you are looking for stops in far southern California that would fit in with the general tenor of your RoadTrip, have a look at Joshua Tree National Park and Anza-Borrego Desert State Park, and spending a night either camping in one of them or at a hotel in Palm Springs.

AZBuck