Pacific slope from central British Columbia to western Montana, south thru California and western Nevada to San Pedro Martir Mountains, Lower California.

Southern Rocky Mountains from northern Nevada to southwestern South Dakota, south thru Arizona and southwestern Texas.

A tree from 40 to 60 feet high, distributed at elevations of between 5,000 and 10,000 feet in the Black Hills of Dakota and northwestern Nebraska, southward to New Mexico and southern Arizona.