Challenge Cost Share Program (CCSP) Through the CCSP, the NPS and partners work together to preserve the Trail. more...
Site Certification More than 120 certified sites are found along the Trail. Learn more about site certification. more...
Did You Know?
Seaman, Lewis’s Newfoundland dog, joined the Expedition in Philadelphia when Lewis purchased him for $20. On the journey, Seaman served the Corps as hunter, sentry, and companion. Upon reaching the Pacific, Seaman became the first dog to travel the breadth of the North American continent.