The Siskiyou chipmunk is named for the rugged Siskiyou Mountains straddling the Oregon-California border, a range known for unusually diverse forest types packed into a small area, and its real range in the state is confined to that corner of southwestern Oregon rather than the coastal dunes and Willamette Valley terrain more typical of other Oregon mammals.
All 24 of Oregon’s records come from iNaturalist rather than trapping surveys, with no strong seasonal signal in the data. NatureServe ranks the species S4, apparently secure, in Oregon, and like other chipmunks it’s active by day, foraging for seeds and fungi through the warmer months before retreating underground for winter.
