mt.gov Montana Official State Travel Site
Facebook Flickr Twitter Youtube 1.800.847.4868


Missouri River

Much of the Montana landscape that Lewis & Clark crossed remains unchanged. From river canyons to mountain meadows. Montana's rivers and highways flow past scores of landmarks related to the expedition.

Join us on the trail using our interactive map. Follow the route of the Corps of Discovery across Montana and take in the historical account of the historic journey as well as plan your own expedition to see and experience the same sites and sights that Lewis and Clark experienced more than 200 years ago.

The Expedition Begins

In 1804 a hopeful Thomas Jefferson sent Captains Meriwether Lewis and William Clark to find the fabled River of the West. From the time of Columbus, explorers and statesmen had dreamed of a Northwest Passage, an all-water route connecting the trade routes of the Pacific to the Old World of the Atlantic. As president of a still-young nation, Jefferson had pressed for the Louisiana Purchase to strengthen American trade and settlement. The final $15 million-dollar agreement with France doubled America's size overnight.

Lewis & Clark in Montana

On April 25, 1805, the Corps of Discovery camped by the riverside near the future site of Fort Union. Lewis and Clark hoped they were only weeks away from the Pacific via an all-water route, the mythical Northwest Passage. The group rested and celebrated their arrival at the confluence of the Yellowstone and Missouri rivers. The expedition journals noted the spot's potential as a trade location between two navigable rivers, the early highways of commerce. Entering what would be Montana led the expedition into the land of the Blackfeet. Their first contact with this tribe had been less than promising.

The Northwest Passage was not Jefferson's only priority. In fact, of the tasks assigned them, Lewis and Clark accomplished the most within the modern borders of Montana. Contact and negotiations with native tribes, the reconnaissance of suitable sites for trading posts and forts, and scientific accounts of the land's plants, animals, and scenic resources were all in keeping with Jefferson's hopes for the expedition. .

Location Date
1. Fort Union Trading Post April 26th, 1805
2. Glasgow and the Milk River May 8th, 1805
3. Fort Peck May 10th, 1805
4. Charles M. Russell National Wildlife Refuge Auto Tour April 29th, 1805
5. Missouri Breaks National Back Country Byway May 31st, 1805
6. Fort Benton June 4th, 1805
7. Loma and the Marias River June 2nd, 1805
8. Upper Missouri National Wild and Scenic River May 31st, 1805
9. Great Falls June 13th, 1805
10. Gates of the Mountains July 19th, 1805
11. Helena and Canyon Ferry Recreation Area July 21st, 1805
12. Missouri Headwaters State Park at Three Forks July 27th, 1805
13. Beaverhead Rock State Park August 8th, 1805
14. Clark’s Lookout State Park August 11th, 1805
15. Camp Fortunate Overlook August 12th, 1805
16. Lost Trail Pass September 2nd, 1805
17. Ross’ Hole at Sula September 4th, 1805
18. Travelers Rest State Park September 9th, 1805
19. Lolo Hot Springs September 13th, 1805
20. Lolo Trail and Lolo Pass Visitor Center September 13th, 1805
21. Pompeys Pillar July 25th, 1806
22. The Yellowstone River July 13th, 1806
23. Camp Disappointment July 26th, 1806
24. Lewis and Clark Interpretive Center June 23rd, 1805
25. Giant Springs Heritage State Park June 18th, 1805