We spent today in a transition zone between the wet western side of the Cascade Mountains and the rain shadow of the eastern side of the Cascades. As we traveled towards Rowena Crest overlook, the vegetation dramatically changed from Sitka spruce and Western red cedar to Garry oak and big-leaf maple. The geology became more apparent as the vegetation became sparser. As we continue our travels eastward, big-leaf sagebrush will become the dominant plant of the landscape.