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What areas did the Lewis and Clark expedition and the Pike expedition explore? Lewis and Clark explored the Northern part of the Louisiana Purchase, traveling up the Missouri River, and Pike explored the southern half, looking for the start of the Red River. Why were Meriwether Lewis and William Clark chosen to lead the exploration of the Louisiana Purchase? Lewis was chosen because of his experience as a leader, and Clark was chosen for his mapmaking skills.
The Exploration of the Louisiana Purchase. It is often said that the purpose of the Lewis and Clark Expedition was to explore the Louisiana Purchase, the vast land purchase that doubled the size of the United States. In fact, the expedition had been planned and Jefferson was intent on it proceeding before the United States had any expectation of purchasing land from France.