Access to Whitman Mission National Historic Site - photo NPS South side of highway. This site commemorates the courage of Marcus and Narcissa Whitman, the role the Whitmans played in establishing the Oregon Trail, and the challenges encountered when two different cultures meet. In 1836, before the wagon trains, a small intrepid group of Presbyterian missionaries traveled with the annual fur trapper’s caravan into “Oregon Country.” Missionaries Narcissa Whitman and Eliza Spalding became the first white women to travel across the continent. White Pass Scenic Byway - Lewis and Clark Trail This scenic highway has numerous campgrounds both state and private. There are many lodging opportunities along the way. From the junction of Interstate 5 to Naches is called the White Pass Scenic Byway. At Kennewick the highway joins the Lewis and Clark Historic Trail. The mountainous areas have many roadside turnouts with viewpoints where photographers will enjoy the vistas that await them.