ORS 366.905 “Old Oregon Trail” designation

All that portion of the east and west state highway across the state, commencing at the Idaho state line at Ontario and Nyssa, through Huntington, Baker City, La Grande, Pendleton, Umatilla, The Dalles, Hood River, Portland, Astoria and ending at Seaside on the Pacific Ocean, is designated as the Old Oregon Trail. That portion of the highway from The Dalles to Astoria shall retain its identity as the Columbia River Highway section of the Old Oregon Trail. The road from Hood River, up the Hood River Valley around Mt. Hood, through Oregon City and on to Portland, shall be known as the Mt. Hood Loop section of the Old Oregon Trail.