On I-15/US 87. The Lewis and Clark National Historic Trail Interpretive Center is a major stop on the entire length of the Trail. The Center also includes the Lewis and Clark Trail Heritage Foundation office and its extensive historical library. Passing through the five falls of the Missouri River was back-breaking work for the Corps that took a month to complete. Today, four of the falls can be enjoyed along the walkways and overlooks through the heart of the city. Visitors can see the world’s largest freshwater springs at Giant Springs State Park. The C.M. Russell Museum Complex features the works of America’s famous cowboy artist Charlie Russell. First Peoples Buffalo Jump State Park is west off I-15 and offers a great view of the Missouri River Valley. CentralMontana.com FWP.MT.gov/first-peoples-buffalo-jump