The Sierra Nevada red fox is a montane red fox subspecies. Its presence in Oregon was confirmed in 2015, specifically in the Mt. Jefferson, Mt. Washington, and Three Sisters Wilderness Areas. 

The Sierra Nevada red fox is smaller than the red fox and averages about eight pounds. This fox has three color phases: silver (black), "cross" color phase and the more familiar red. 

The Sierra Nevada red fox is an Oregon Conservation Strategy Species in the East Cascades, Klamath Mountains and West Cascades ecoregions.

Research continues on this species in the Oregon Cascades. Biologists captured and radio-collared several Sierra Nevada red foxes in Deschutes County in 2017.