Uses ground nests and nests under logs. Compared to other chipmunks, this species has a lower rate of water loss, greater tolerance for heat load, high relative medullary thickness of the kidney, and concentrated urine. In the alpine zone, the presence of talus is important. In Great Basin shrub types, highest densities are encountered where bitterbrush is present. This species is competitively excluded by other chipmunks, therefore, the range of habitats occupied depends on the presence or absence of other chipmunk species.
Males enter hibernation first.
Reported home ranges vary. An exclusive territory is not maintained, except perhaps around the nest. The home ranges of females are more exclusive than those of males. Mating occurs March through April, with gestation lasting 28-30 days. Average litter size about 6, with single litter per yr most common.