Today in History - 1805

Four days after forging ahead of the main body of the expedition, Meriwether Lewis was overjoyed to hear "the agreeable sound of a fall of water." Soon after he "saw the spray arise above the plain like a column of smoke.... [It] began to make a roaring too tremendous to be mistaken for any cause short of the great falls of the Missouri." By noon, Lewis had reached the falls, where he stared in awe at "a sublimely grand specticle [sic].... the grandest sight I had ever held."

Lewis and Clark had been correct--the south fork was the Missouri River. The mysterious northern fork was actually the Marias River. Had the explorers followed the Marias, they would have traveled up into the northern Rockies where a convenient pass led across the mountains into the Columbia River drainage. However, Lewis and Clark would not have found the Shoshone Indians nor obtained horses. Without horses, the crossing might well have failed.

Three days after finding the falls in north-central Montana, Lewis rejoined Clark and told him the good news. However, the captains' elation did not last long. They soon discovered that the portage around the Great Falls was not the easy half-mile jaunt reported by the Hidatsa, but rather a punishing 18-mile trek over rough terrain covered with spiky cactus. The Great Portage, as it was later called, would take the men nearly a month to complete. By mid-July, however, the expedition was again moving ahead. A month later, Lewis and Clark found the Shoshone Indians, who handed over the horses that were so critical to the subsequent success of their mission.