The St Regis River begins at Lookout Pass in which mountain pass on the Idaho/Montana border?
St. Regis River (Montana) The St. Regis River is an approximately 32.5 mi tributary of the Clark Fork of the Columbia River in Montana in the United States. It begins at Lookout Pass on the Idaho/Montana border, flows east and ends at the confluence with the Clark Fork in the city of St. Regis. Its drainage is 330 sqmi . The record high flow for the St. Regis River in Montana was recorded on May 19, 1954 at 11,000 cubic feet per second according to USGS gaging data.
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.