When found in faster waters, they typically reside close to banks in small pools and side-channels under riparian vegetation.

In a sample of 20 individuals from the Calapooya River, a gut analysis showed traces of infaunal Chironomids, epifaunal Dytiscids, Ephemeroptera, and sand.

Introduced Smallmouth bass are presumed to be the cause of this decline for a variety of reasons (direct predation, competition, etc.).

Above the lateral line is a peppering of brown scales that extends from the caudal peduncle to the nose of the fish.

Umpqua chub have a distinctive upside-down heart shaped mark on top of their head behind their eyes.