In the late 1880's, Marcus Daly built a summer home for his family in Hamilton, the heart of the beautiful Bitterroot Valley. The Daly Mansion and the estate known as "Riverside", were once part of Daly's 22,000-acre Bitterroot Stock Farm. After Daly's death in 1900, Margaret Daly, his window, had the home remodeled into the current structure. The Georgian Revival style mansin was designed by A.J. Gibson and completed in 1910. The mansion occupies 24,000 square feet on three floors, with 25 bedrooms, 15 bathrooms and 7 fireplaces, 5 of which are faced with Italian marble. After MRs. Daly's death in 1941, the mansion was closed and boarded up until 1987, when it was open to the public.