How far did the Lewis and Clark expedition go?
In spring 1805, they continued to the headwaters of the Missouri River, struggled across the Continental Divide, and headed west along the Salmon, Snake, and Columbia Rivers to the Pacific. They landed at the mouth of the Columbia River, Astoria, Oregon. In total they had traveled 7,689 miles (13,532,640 yards; 40,597,920 feet). The expedition then ended on September 23, 1806 upon their return to St. Louis from Oregon.
