The larger, golden-mantled ground squirrel is often mistaken for a chipmunk.
Think of the golden-mantle as a golden shawl over its shoulders.
Stripes run down the backs of both critters, but a chipmunk’s stripes continue above and below each eye down to its pointed nose.
Since this was posted, I’ve received requests for a picture of the golden-mantled ground squirrel and the identity of the squirrel that is smaller and darker than the western gray squirrel (Sciurus griseus).
Thanks for asking.