Traveler's Rest was an important campsite for the Corps of Discovery on both the westbound and eastbound parts of their journey.

Traveler's Rest. This camp along the Bitterroot River, just south of today's town of Lolo, Montana, is the only campsite of the Lewis and Clark Expedition that archaeologists have been able to prove with physical evidence, such as fire pits and a latrine. Lewis and Clark named the creek here "Travelers' Rest," and the Corps camped at its mouth from September 9 to 11, 1805, to rest and get ready to cross the high Bitterroot Mountains on the Lolo Trail. After three days of preparing and recovering their strength, they left camp on September 11 or 12, beginning a difficult 9- to 11-day trip of about 200 miles along the snowy Lolo Trail, led by their Shoshone guide Old Toby. They had some food with them when they started, but hunting was hard in the steep mountains, and at times they went hungry and worried about finding enough to eat for themselves and their horses.