Final answer:
Meriwether Lewis and William Clark traveled approximately 2,000 miles from St. Louis to Ft. Clatsop during their expedition. Their journey was part of the larger exploration of the western lands of the United States.
Step-by-step explanation:
The explorers Meriwether Lewis and William Clark traveled approximately 2,000 miles from St. Louis to Ft. Clatsop. They embarked on their expedition in 1804 and reached the Pacific Ocean in 1805, spending the winter of 1805-1806 in Oregon before returning to St. Louis. Their journey was part of the larger exploration of the western lands of the United States and their purpose was to discover potential trade routes and assess the commercial possibilities of the new territory.