The first Rock Chuck was in a field, about 50 yards away, and the animal ran across the field to a big pile of rocks.
The second Rock Chuck was in the rocks near the turn-around-point of the northward segment of the Jordan River Parkway. You can tell the animal was one of the "babies" because of its darker color and smaller size. The adults are about twice as big and have a lot more reddish-brown. The video clip shown below was of this Rock Chuck.