It does not take much to make a 'den' and they move at the drop of a hat. Depressions and overhangs in the basalt bluffs are busy. Look at the base of most any thick sagebrush plant. A hole you think is to small for a badger sure could hold mom and pups. Under a draw full of russian thistle is a great site. They often just disappear, watch close, you'll see them.