I believe this is a Golden-Mantled Ground Squirrel. Initially I thought it was a chipmunk, but when researching it, it doesn’t have the striping on the face like a chipmunk. The closest I came was the Golden-Mantled Ground Squirrel. I used this website to identify it (click here).
In Oregon, this ground squirrel can be found on east slope of the Cascade Range (which is where we are) and most of central Oregon, and the Siskiyou mountain, Wallowa Mountains, on Steens Mountain and southeastward south of Huntington, Baker County.
The Golden-mantled Ground Squirrel is active diurnally from late winter-early spring to mid autumn. Most of its activity is confined to the ground where it travels rapidly among stumps, logs, or other slightly elevated prominences. In late summer it is highly visible as it scurries about gleaning seeds.
Maralee
Through My Lens 
Now I’m going to have to take a closer look at what I think are chipmunks running around my yard.
They do look a lot like the chipmunk except for the stripes on the face so hey Maralee anyone could have thought they were chipmunks right. LOL
Really nice photos and you’re right about the ID. Our family camped a lot so I learned to tell the difference fairly young. Chipmunks tend to be smaller also.
Dashing little fellow!
Beautiful images, his change in color down the body is gorgeous!