- Columbia Falls Natural Area Preserve (dnr.wa.gov)
This area protects two state-threatened, four sensitive plant species, and the Larch Mountain salamander (a state-threatened species). Basalt cliffs and steep talus slopes make this site nearly inaccessible. The habitat for many of the rare species is very sensitive to disturbance. The 1,234-acre site contains undisturbed natural forest communities and nine plant species which occur only in the Columbia River Gorge.