On-A-Slant Indian Village, near Mandan Lewis and Clark Interpretive Center, Washburn Fort Union Trading Post National Historic Site, near Williston NORTH DAKOTA IS RICH WITH THE LEGACY OF LEWIS AND CLARK The explorers documented adventures along the Missouri River that visitors can still see today. Here they saw grizzly bears, giant cottonwood trees and the Knife River Indian Villages with a population larger than St. Louis. Though it has changed, this is still the same mighty river that drains a watershed of more than a half-million square miles from 10 states and 2 Canadian provinces. 52 1-800-HelloND (435-5663) During their journey, the Corps of Discovery met Native American tribes including Mandan, Hidatsa and Arikara. Follow the trail to On-A-Slant Indian Village near Mandan, where you can step inside six reconstructed earthlodges. Then continue to Knife River Indian Villages National Historic Site near Stanton to explore the rich heritage of the people who lived in the area long before the expedition arrived.