This section is rich with historical locations, and includes several alternate routing options. At Three Forks, the Missouri River splits into the Gallatin, Madison and Jefferson Rivers, and you will leave the Missouri for the final time. Just south of Dillon, there's a choice to remain on the main westbound route or take the Big Hole Option. The main route over Lemhi Pass includes 24.4 miles of gravel while the Big Hole Option is slightly shorter and is entirely paved. The 17.7-mile gravel Gibbon's Pass Alternate crosses the Continental Divide at the same location as Clark on his return journey in 1806. If you choose to ride the main route, you have the opportunity to ride along "The River of No Return" on the 18.3-mile Shoup Spur. From North Fork, Idaho, it is nearly a straight shot north to Lolo, Montana, the site of Travelers' Rest State Park. This is the site where Lewis and Clark stopped in each direction to rest and regroup for the next stages in their journey.

Map Resources

• Map Features
• Map Updates and Corrections (Addenda) - Always be sure to check for map updates and corrections before leaving on your trip.
• Temporary Road Closure Information
• Frequently Asked Questions