Starting up the road to Harts Pass out of Mazama, WA.  This road eventually gets to 7,488 ft making it the highest road in Washington State.  Not high by Colorado standards, but plenty high. 

Harts Pass is also a "back way" into Whatcom County, where Bellingham is.  The only way to get there, by road, is from Okanogan County.  The road dead ends just inside the Whatcom County line near the top of the divide.