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?
In preparing for his journey, Meriwether Lewis obtained passports from the British, French and Spanish. By the time he departed in August 1803, these were unnecessary. The United States had acquired the lands of the Louisiana Purchase four months earlier.