Benjamin Louis Eulalie de Bonneville was an American officer in the United States Army, fur trapper, and explorer in the American West. He is noted for his expeditions to the Oregon Country and the Great Basin, and in particular for blazing portions of the Oregon Trail.

Joseph R. Walker was a mountain man and experienced scout. He established the segment of the California Trail, the primary route for the emigrants to the gold fields during the California gold rush, from Fort Hall, Idaho to the Truckee River. The Walker River and Walker Lake in Nevada were named for him by John C. Frémont.