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Bruce Miller rock climbing on the hardest part or 'crux' of the route 'The Wisdom', rated 5.11b, on the Redgarden Wall in Eldorado Canyon State Park, CO. Eldorado, located on the Front Range south of Boulder, and its steep, difficult sandstone cliffs attract climbers from around the country and the world, making it one of the most popular climbing areas in Colorado. (KEYSTONE/CAVAN IMAGES/Beth Wald)