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Pinnacle Valley's pinnacles are formed from the eroded cores of volcanic fumorals.  Near Lost Creek Campground.  Crater Lake, the most famous feature of Crater Lake National Park spans five miles and is ringed by nearly 2,000 foot cliffs formed by the collapse of a volcano called Mount Mazama.  The 1,943 foot lake is the deepest lake in the U.S. and one of the deepest in the world.  Crater Lake National Park, in Oregon, is a highlight of the National Volcanic Scenic Byway.
082809Pinnacle Valley, Crater Lake National Park1439Douglas Orton.jpg