Thanks for the great tip! I've gone over Chinook Pass from somewhere near Enumclaw, but that was in the spring and they were doing blasting above the road somewhere to the east, so I didn't dare go further. Haven't explored that part of the state much. I remember there being a scenic canyon outside of Yakima, it might be too hot for comfort now, would this be better in the spring or fall if the heat winds up being too much for me?