No travel restrictions from California. The state is more interested in WHO you are with, not how far you go. They want you to stay with-in your bubble. No gatherings of more than 10 total people. Those should be held outdoors with masks and social distancing. My daughter has her own home 6 miles from us, and WAS in our bubble but we are staying apart because one of her co-workers may have been exposed to covid-19. If that workers test comes back negative, she is back in our bubble, if that worker tests positive we will have to stay apart for 14 days from the date our daughter last worked with that person. 7 days have passed so far, and given how long test results are taking to come back, we may pass the 14 days before the test results come in.
Our son, daughter in law and Granddaughter also live 6 miles from us, but they are not in our bubble. We have seen them once since March and that was only outdoors, with masks, and socially distanced.