Once we'd left Montana, we headed on Hwy 90 across the northern Idaho panhandle, into Washington at Spokane. From there we went south, through the natural desert turned wheat farmland of eastern Washington, crossing the Columbia River at Umatilla, Oregon. Umatilla, and town next door, Hermiston, are the site of one of the dams Dan's dad helped build in the '50s. His family lived in the area during that time. Since it was July and it was the desert, Umatilla was HOT. We stayed two days.