Rocky Mountain Goat , also mountain goat, common name of a species of antelope that inhabits the high mountains from the northwestern United States to Alaska. Mountain goats live in regions of heavy snowfall and tend to inhabit localities with many crags and cliffs. They are excellent climbers, and their hooves, which have soft pads rimmed with sharp edges, enable them to climb and run on snow, ice, or bare rock. The Rocky Mountain goat is 90 to 120 cm (36 to 47 in) tall at the shoulders. The body is sturdy and the legs are short and stout. Both sexes have black horns, which contrast with the yellowish-white, shaggy hair covering the entire body, and a beardlike tuft of hair underneath the chin. Rocky Mountain goats are herbivorous ruminants, feeding on any exposed vegetation they find. They are not gregarious, except during the mating season between November and early January. The young are born generally between May and June .