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Terry Elder, a park interpreter at Devil's Den State Park, left, leads a hike of the Devil's Den Trail Friday, March 15, 2013, at the park in southern Washington County. The event featured a discussion of the kinds of life one finds on a trail in the Ozarks and the different heights, from the floor to the tops of trees, that they live in. The park plans events for the coming week of spring break. Visit arkansasstateparks.com for more information.