Who blazed a trail across the Rockies?

North America is a vast continent, and nearly 200 years passed before explorers found their way along its rushing rivers and across its mighty Rocky Mountains to stand on the eastern shore of the Pacific Ocean. The trailblazers were Meriwether Lewis and William Clark, in November 1805.

[Lewis and Clark were helped by a Shoshone native American woman called Sacagawea, who acted as their interpreter.]