Anza-Borrego Desert State Park, Anza-Borrego Desert, Coachella Valley, San Diego County, California
I also shot video of the frog croaking. Agua Caliente campground was loaded with frogs.
Blue rings in occellus are somewhat broken, suggesting it might be O. bimaculatus rather than O. bimaculoides, but they don't have any "starburst" appearance so it is most likely bimaculoides.