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.
Wise River The Wise River is a tributary of the Big Hole River, approximately 30 mi (48 km) long, in southwestern Montana in the United States. It rises in the Beaverhead National Forest in the Pioneer Mountains in Beaverhead County. It flows NNW through the mountains and joins the Big Hole near the town of Wise River. The river has also been known as Elkhorn Creek.