Leading packhorses, the Lewis and Clark Expedition followed their Shoshone guide Toby up Tower Creek on August 31, 1805. The Indian road went northwest from here across the foothills to the North Fork of the Salmon. Behind the Corps of Discovery were the Missouri River, the crossing of the Continental Divide, and a timely encounter with the Lemhi Shoshone. Ahead lay three weeks of formidable mountain ranges, cold, snow, and starvation. On the first uphill pitch the next morning, one of the horses fell and rolled backward. It was not hurt, but the start proved ominous. Joseph Whitehorse recalled that they followed up the creek or spring branch, found plenty of wild or choke cherries and service berries, and that one of the hunters killed a deer at the edge of the evening.