Tree with tapering trunk, conical crown of slender horizontal or drooping branches, and very slender, curved, drooping leader; a prostrate shrub at timberline. Needles evergreen. Height: 30-100 ft (9-30 m). Diameter: 1-3 ft (0.3-0.9 m).
Moist, coarse or rocky soils, from sheltered valleys to exposed ridges; with firs and in mixed coniferous forests.
Southern Alaska southeast along Pacific Coast to British Columbia and in mountains to central California; also southeastern British Columbia south in Rocky Mountains to northern Idaho and northeastern Oregon.
Mountain hemlock is a characteristic species of high mountains, varying greatly in size from a large tree at low altitudes to a dwarf, creeping shrub at the timberline.