When the Mountains Roared

Historical marker location:

East Portal, Montana

( Marker can be reached from Rainy Creek Road (Federal Road 506) 2 miles south of Exit 5 (Taft) (Interstate 90).)

Marker installed: 2010

The Lewis and Clark Expedition passed through Montana in 1805-1806, on their journey to explore the western portion of the United States. They traveled up the Missouri River and crossed the Rocky Mountains, encountering many Native American tribes and documenting the flora and fauna of the region.