I biked the highest point in San Luis Obispo County, Caliente Mountain.
The peak is in one of California's hidden gems: the Carrizo Plain National Monument. It's in the Taft/Maricopa area west of Bakersfield, CA. It's basically a large, flat-bottomed bowl that, in spring, reminded me of the prairie states. Right down to omnipresent crickets.
This is the highest point in Arizona. I had tried it several years ago in May. The snow made finding the trail difficult and because of that I had to turn around at the ridge. This time there was no snow and I summited. Unfortunately there were approximately 4 million other people on the trail, including three groups playing music. It was also cold and very windy up top. On a less tempestuous weekday it would have been more of an aesthetic experience.