In mid-May 1804, Meriwether Lewis and William Clark set out from St. Louis, Missouri, leading a group on an ambitious mission. The group, called the Corps of Discovery, was to explore the unmapped land west of the Mississippi—territory completely unknown to most Americans. Then in mid-November 1805, Lewis and Clark looked out at the waves of the Pacific Ocean, completing their trek across the country. But what challenges did the group face along the way? And what was the enduring legacy of the famous journey? Through the compelling, easy-to-read graphic novel format, young readers can learn why the expedition reaching the west coast is among the greatest moments in history.