In the west, the subalpine zone is dominated by mountain hemlock. It occurs along with subalpine fir from in the Bailey Range; however, the range of this forest type is not extensive and does not extend much west of Mount Olympus, nor is it common in the east. Chamaecyparis nootkatensis|Yellow-cedar is sometimes found in relation to these plants. In the east and other drier areas, the subalpine zone is dominated by subalpine fir. It can occur with other trees, including mountain hemlock, silver fir, and yellow-cedar, but what characterizes these zones is the dominance of subalpine fir. These forests occur on the eastern ridges from .