Mount Redoubt volcano rises 10,197 feet above Cook Inlet, about 50 miles to the west of Alaska's Kenai Peninsula, making it one of the dominant landmarks on the horizon of the towns of Kenai, Soldotna, Anchor Point and Ninilchik and Clam Gulch. After a 20-year period of dormancy, the mountain erupted during a several month span in 2009, coating areas of Alaska with ash, disrupting international and domestic air travel, and halting oil and natural gas production in Cook Inlet.