Boulder Hot Springs Inn, Spa, & Retreat Center is 30 miles from the Helena Airport and 45 miles from the Butte Airport. Take I-15 south from Helena or north from Butte. Exit from I-15 at the Boulder Exit. Drive through the town of Boulder. Boulder Hot Springs is 3 miles south of Boulder on Highway 69. Watch for signs and the large mission style gray building with a red roof on the right side of Highway 69.