Which explorers followed the Missouri River to the Snake River to the Columbia River to the Pacific Ocean?

The explorers who followed this route were Meriwether Lewis and William Clark during their famous expedition from 1804 to 1806. Commissioned by President Thomas Jefferson, their journey aimed to explore and map the newly acquired Louisiana Territory and find a water route to the Pacific Ocean. They navigated the Missouri River, crossed the Rocky Mountains, and ultimately reached the Columbia River, which they followed to the Pacific Coast.