Lewis and Clark Pass, el. 6424ft is a mountain pass on the continental divide in Montana. It lies at the head of the drainages of the west flowing Blackfoot River and the east flowing Dearborn River. The pass is in the Helena National Forest in Lewis and Clark County. The Continental Divide Trail traverses north and south through the pass. At the time of the Lewis and Clark Expedition the pass was a much used prehistoric pathway where the native tribes and bands living in eastern and western Montana crossed over the continental divide. The pass was crossed by Meriwether Lewis on July 7, 1806, on the return leg of the Lewis and Clark Expedition with a party of nine men and his dog Seaman. The pass was named for the expedition's two leaders - Lewis and William Clark. Lewis and Clark Pass is the only roadless pass on the entire Lewis and Clark National Historic Trail. It has gone from being one of the most used continental divide passes in aboriginal times to one of the least visited passes today. It can be accessed by a 1.5mi trail. Visitors will encounter the pass much as Lewis did in 1806. The furrows left by the countless dog and horse travois that crossed the pass are still visible and this is one of the few places along the expedition's route that visitors may still encounter a grizzly bear. On a clear day, like Meriwether Lewis in 1806 one can see Square Butte in Cascade County 40mi to the northeast.
