The range largely consists of reddish metamorphic rock, which are the roof pendant for the Sierra Nevada. That is, this rock was formed in the Paleozoic, and then was subsequently recrystallized and warped by the intrusion of the Sierra Nevada batholith underneath it.
The Sherwin Range is well-known for opportunities for hiking (in the summer) and backcountry skiing (in the winter).
The range is named after Jim Sherwin, who operated the first toll road across the Sierra. The toll road started from Mammoth Lakes.