This route was created to celebrate the anniversary of the Corps of Discovery's 1804-1806 historic journey and offers cyclists the opportunity to follow the path of the intrepid explorers Captains Meriwether Lewis and William Clark. It includes seven map sections detailing the 1804-1805 westbound trip, roughly following the Missouri and Columbia rivers, and one map section showing Clark's 1806 eastbound return along the Yellowstone River.