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8842 mountain trail runner.jpg
Foothills in summer, Boulder, Colorado
Copyright John Kieffer 2014
Boulder, Colorado, Flatirons rock formation, Foothills, Front Range, Man running, Mesa Trail, Shadow Canyon, Shadow Canyon Trail, dirt path, dirt trail, foot trail, hiking trail, jogging, male, path, summer, trail, trail running, Colorado sports, Colorado recreation, Colorado lifestyle, Colorado running