natural bridges national monument with evening sun on owachomo bridge from armstrong canyon trail, southwest desert, utah

america american arch armstrong blue bridge bridges canyon cliff clouds cloudy colorado desert destination dramatic environment erosion evening formation geological golden hike hiking hill illuminated illuminates imposing juniper last light monument national natural nature north outdoor outdoors owachomo park permian pinyon plateau radiant rock rocky sandstone schnebly sheer shining sinking sky southwest spectacular states stone summer sun sunlight sunshine tectonics topography trail travel trees tuwa united uplift usa utah wash water west western wild wilderness