Before Lewis met up with Clark, he began the expedition on August 30, 1803 in Pittsburgh PA. Lt. William Clark would offer to join Lewis on the expedition weeks later on October 13, 1803 at Camp Dubois (in present-day Indiana). From there, they sailed down the Ohio River towards St. Louis. 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 on November 7, 1805.
Therefore it took 2 years, 2 months, 9 days to reach the Pacific.
If you don't believe me that the expedition began in Pittsburgh and NOT St. Louis, then follow the related link to the Louis and Clark Journals' first entry. As we all know, the common American history textbook likes to smudge the details.
Lewis and Clark.
The pacific
Washington
Lewis and Clark reached the Pacific in 1805. The Erie Canal opened in 1825.
The Pacific Ocean.
18 months
18 months
Lewis and Clark were trying to reach the Pacific Ocean during their expedition in search of an overland route to the Pacific Northwest.
Pacific ocean
Lewis and Clark had to cross the Rocky Mountains to reach the Pacific Ocean. This rugged and challenging terrain presented a significant geographical barrier for their expedition.
Fort clatsop
Lewis and Clark had to cross the Rocky Mountains to reach the Pacific Ocean.