Section 6 of the Lewis & Clark Bicycle Trail can be broken into two segments based on the Corps multidirectional travels. Missoula, Montana, to Clarkston, Washington, is a continuation of Lewis and Clark's 1804 travels westbound. The Blackfoot Option from Missoula, Montana, to Great Falls, Montana, follows the route Captain Lewis used eastbound in 1806. Both segments are described below. Main Route The main route follows the course of the Lochsa and Clearwater Rivers and is fairly level after crossing Lolo Pass. The 145.3-mile Lolo Trail closely follows the approximate route the Corps of Discovery took through the Bitterroot Mountains. The rugged, mountainous terrain is on mostly one-lane, narrow, gravel/dirt roads. Services and water are scarce. Once you arrive in Kamiah, there are two options to Clarkston. The 68-mile River Option is more true to history but there are concerns on U.S. Highway 12 due to traffic volumes and nonexistent shoulders with concrete barriers. From the main route, you still get to make a choice on your way into Clarkston: either the seven-mile Lapwai Option on U.S. Highway 95 or the 22.5 mile Hell's Gate Option on smaller roads through Hell's Gate State Park. Blackfoot Option This option traces Captain Lewis's 1806 eastbound journey. It is mostly on two-lane highways that follow the Blackfoot and Sun Rivers all the way to Great Falls. The Alice Creek Spur is 13 miles in length and you can ride/hike to the top of Lewis & Clark Pass. ABOUT ADVENTURE CYCLING MAPS Adventure Cycling maps are created by cyclists, for cyclists, and they are some of the best available for those in search of discovery and adventure in North America. The maps reflect the association's research as well as suggestions from thousands of cyclists who have explored the Adventure Cycling Route Network. Adventure Cycling develops the best cross-country, loop, coastal, and inland cycling routes available, with turn-by-turn directions, detailed navigational instructions for the tricky sections, and elevation profiles in the high country. The maps are waterproof and designed to fit in a handlebar-bag window or jersey pocket. The maps provide information specifically for cyclists: the location of bike shops, sources for food and water, and listings of overnight accommodations including camping facilities, small hotels, and cyclists-only lodging. "