Can someone tell me what kind of reptile is this?
My guess is that you have in your a hand a lizard of the Genus Sceloporus , and perhaps Sceloporus occidentalis longipes.

Commonly called the Great Basin fence lizard is a subspecies of the western fence lizard . It is genrally found in the western part of North America 





Here is  a link to a guide of small spiny lizards .