Western Fence Lizard (Sceloporus occidentalis)
Lovely iridescent blue highlights in the sunlight. Many lizards this late May summertime hike. Lower Arroyo Trail, 5/27/2020, 7:44:49 am. AKA Blue-bellied Lizard. This is the subspecies Coastal Range Fence Lizard (S. occidentalis bocourtii), according to Wikipedia.