The St Regis River begins at Lookout Pass in which mountain pass on the Idaho/Montana border?
Lookout Pass Lookout Pass is a mountain pass in the Rocky Mountains of the northwestern United States. In the Coeur d'Alene Mountains of the Bitterroot Range, the pass is on the border between Idaho and Montana, traversed by Interstate 90 (formerly U.S. Route 10) at an elevation of 4710 ft above sea level.
Chief Mountain Border Station and Quarters The Chief Mountain Border Station and Quarters is a customs station on the Canada–United States border in Glacier County, Montana. Located on Montana Highway 17, the station is operated seasonally, primarily for tourist traffic between Glacier National Park in Montana and Waterton Lakes National Park in Alberta. The station is named after Chief Mountain, a prominent peak in the vicinity. The station is owned by the General Services Administration and operated by the U.S. Customs Service, and is located within the boundaries of Glacier National Park. The station is a notable example of the National Park Service Rustic style and is listed on the National Register of Historic Places.