Road Trip Summary
Over more than 3,000 miles, this epic journey traces the Missouri River through the Plains, crosses the Continental Divide in Montana, follows the Clearwater and Columbia Rivers, and finishes at the Pacific Ocean. Structured as six connected chapters, this bucket list road trip can be completed as a full 15-day journey or experienced in standalone 2 to 3-day (minimum) regional drives. Each segment balances scenic highways, meaningful Lewis and Clark landmarks, and realistic daily mileage with overnight hubs in gateway cities. Whether you drive one chapter or the entire route, the journey unfolds through rivers, watersheds, and the shifting landscapes of the American West.
Choose Your Adventure
Each chapter of the Lewis & Clark Expedition Road Trip is its own unique blacktop adventure, whether you’re looking for a shorter regional drive or ready to keep following the trail farther west.
Chapter 1: The Lower Missouri River
Chapter 2: Across the Great Plains
Chapter 3: The Upper Missouri River
Chapter 4: Along the Yellowstone River
Chapter 5: Headwaters & Continental Divide
Chapter 6: Columbia River to the Pacific
Full Expedition Highlights
Here’s everything you need to know to map out your Lewis & Clark Expedition Road Trip.
- Total Distance: 3,000+ miles
- Travel Time: 15 days (or more)
- Expectations: Complete the full westbound arc in one continuous journey, or tackle any of the 6 chapters as separate regional drives.
- Best Time to Travel: May through September for optimal mountain road conditions.
- Road Conditions: Mountain passes may be seasonally impacted; check local advisories.
- Fuel Planning: Services are more widely spaced in North Dakota and eastern Montana.
- Landscapes: Scenic river highways, prairie corridors, alpine passes, and coastal byways.
- Rivers Followed: Missouri, Yellowstone, Jefferson, Beaverhead, Clearwater, Snake, Columbia
- Highest Elevations: Lemhi Pass and Lolo Pass
The Six Lewis & Clark Road Trip Chapters
Together, these six drives form a connected westbound road trip from the Midwest to the Pacific Northwest. Individually, each route functions as a standalone regional road trip with defined start and end cities, concentrated Lewis and Clark landmarks, and distinct terrain. Whether you choose a Missouri River road trip, the Montana Continental Divide drive, or a Columbia River Gorge road trip, each segment delivers a complete driving experience while contributing to the broader Lewis and Clark adventure.
Chapter 1: The Lower Missouri River
St. Louis to Omaha Road Trip
The Lower Missouri River road trip begins in St. Louis and follows the Missouri River north through historic departure sites, bluff-top overlooks, and river towns before reaching Omaha. Along the way, stops like Gateway Arch National Park, Camp Dubois, Hermann, Jefferson City, and St. Joseph connect the modern route to the expedition’s opening miles. Scenic stretches along the corridor highlight the powerful current that shaped early exploration. This minimum two-day Midwest drive offers manageable mileage, strong historical context, and an easy introduction to the Lewis & Clark route.
Chapter 2: Across the Great Plains
Omaha to Pierre Road Trip
This road trip across the Great Plains begins in Omaha and follows the Missouri River basin north through Sioux City, Yankton, and Chamberlain before reaching Pierre. Along the way, stops like Ponca State Park, the Sergeant Floyd Monument, and river viewpoints near Chamberlain connect the route to the expedition’s steady push upstream. The landscape opens into wide prairie horizons, where longer highway stretches and quiet overlooks emphasize the scale of the Plains. This minimum two-day drive offers big-sky scenery, and a clear transition from wooded river valleys to the expansive terrain that defined the Corps of Discovery’s early journey west.
Chapter 3: The Upper Missouri River
Pierre to Minot Road Trip
The Upper Missouri River stretch of the Lewis & Clark Expedition road trip from Pierre to Minot centers on the Corps of Discovery’s winter encampment near present-day Bismarck. Following U.S. 83 north through central South Dakota and North Dakota, the route connects prairie landscapes with key stops like Fort Abraham Lincoln State Park and Fort Mandan. Here, the journey slows, allowing time to explore reconstructed earth lodges, river access points, and the surrounding landscape where the Corps prepared for the western push. This minimum three-day chapter shifts to deeper immersion and a more reflective stretch of the Lewis & Clark route.
Chapter 4: Along the Yellowstone River
Minot to Billings Road Trip
This part of the adventure along the Yellowstone River traverses the northern Plains west from Minot into Montana, before turning toward the Yellowstone River corridor and Billings. Along the way, stops include Fort Union Trading Post, the Missouri-Yellowstone confluence, and Pompeys Pillar, where William Clark carved his name in 1806. The route blends wide-open prairie driving with meaningful historic landmarks tied directly to the expedition’s westward and return journeys. This minimum two-day chapter introduces a stronger sense of movement again, bridging the northern Plains with the rugged landscapes of eastern Montana.
Chapter 5: Headwaters & Continental Divide
Billings to Missoula Road Trip
The Billings to Missoula road trip follows the Yellowstone River upstream to its headwaters before crossing the Continental Divide into western Montana. Stops include Missouri Headwaters State Park, where the river officially begins, along with Bozeman and Butte, key waypoints along the route. As the terrain shifts from open valleys to mountain passes, the drive reflects the expedition’s increasing challenges in navigating the Rocky Mountains. Expect at least two days on the road to fully experience the headwaters and high-elevation landscapes. This penultimate chapter combines scenic driving with major milestones, marking the transition from prairie to alpine terrain.
Chapter 6: Columbia River to the Pacific
Missoula to Seaside Road Trip
The final chapter follows the route from Missoula across Idaho and Oregon to the Pacific Ocean at Astoria. You’ll trace the Bitterroot Mountains via Lolo Pass before descending into the Columbia River basin, where the landscape shifts dramatically from dense forest to wide river valleys. Stops include the Columbia River Gorge and Fort Clatsop, where the expedition spent the winter of 1805–1806. Expect at least three days to experience this stretch at a comfortable pace, with time to explore both mountain and river corridor highlights. The last leg of this epic adventure ends at the Pacific Ocean, completing the full westward journey of the Lewis & Clark Expedition.
The Story of Lewis & Clark’s Westward Route
Discover the story of Lewis & Clark's epic journey that helped shape America's westward expansion with a brief history lesson for your modern-day adventure.
In May 1804, Meriwether Lewis and William Clark departed from the Mississippi River frontier near present-day St. Louis with orders to explore the Louisiana Purchase and seek a water route to the Pacific Ocean. Traveling by keelboat and pirogue, the Corps of Discovery pushed upstream along the Missouri River for more than a year, navigating shifting sandbars, unpredictable currents, and unfamiliar territory. By late 1804, they reached the Mandan and Hidatsa villages near modern-day Bismarck, where they constructed Fort Mandan and remained through the winter. During this pause, Sacagawea joined the expedition, and preparations intensified for the journey into the Rocky Mountains.
In 1805, the Corps reached the Missouri headwaters near Three Forks, crossed the Continental Divide at Lemhi Pass, and discovered that no continuous water route to the Pacific existed. After a punishing mountain crossing along what is now called the Lolo Trail, they descended the Clearwater and Snake Rivers to the Columbia River, eventually reaching the Pacific Ocean near modern-day Astoria. There, they built Fort Clatsop and wintered along the damp coastal forest before returning east in 1806.