The largest moles in North America, weighing in at 100 - 171 grams, Townsend's Moles live only in the lowlands on the western side of the Cascade Mountains, from northwestern California to extreme southwestern British Columbia. One population occurs in alpine meadows in the Olympic Mountains of Washington. Learn more about the Scapanus townsendii, more commonly known as a Townsend's Mole, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.