Explorers Lewis and Clark passed through the area in 1805 on the Columbia River, and Marcus and Narcissa Whitman passed through in 1836 to establish a mission at Wailatpu near Walla Walla, Washington.
The route of renowned explorers Lewis and Clark passed through the region in 1805 along the Columbia River, and the path of Christian missionaries Marcus and Narcissa Whitman traversed in 1836 to establish a settlement at Wailatpu near Walla Walla, Washington.