Setting out from the city of Portland in the thickly-wooded western part of Oregon in the USA and crossing the snowy passes of the central uplands, one arrives in the rocky, arid eastern part of the state.
從美國奧勒岡州西邊森林滿布的波特蘭市出發，穿越中部夾帶冰雪的隘口及高地，就可來到東邊滿地枯黃的岩石區。