Grantsdale is three miles south of Hamilton along US Highway 93 at the foot of the Bitterroot Mountains. Hamilton is home to the Marcus Daly Mansion built in the late 1800s. Marcus Daly, one of Montana's colorful "Copper Kings," established Anaconda with his smelter and Hamilton with his lumber industry. He built his family a summer home in Hamilton, the heart of the beautiful Bitterroot Valley.