The geology around Bend, Oregon, has been dominated by extensive volcanism over the last few million years. Repeated glacial advances and retreats have also extensively modified the terrain, and the interplay of these processes has led to spectacular scenery. Tumalo (pronounced “TUM-uh-loh”) Falls is an outstanding example. Located in a heavily forested area, this waterfall flows over an overhanging lip, made by a resistant lava flow, to drop freely almost 100 feet into a glacier-carved canyon. Scars from a major fire in the vicinity in 1979, the Bridge Creek Fire,…
