Stock photography, photos: A man trail running Stock photos of A man running in the back country along a ridge top in the Wasatch mountains, UT.. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: Running, runner, run, training, back country, rocky, ridge, action, active, effort, energy, liveliness, speed, determination, momentum, motivation, strength, aerobic, desire, adventure, freedom, speed, man, male, summer, spring, snow, mountains, California, horizontal, distance, vista, vastness, Outdoor, outdoors, outside, sports, sporting, sport, exercise, physical, fitness, outdoorsman, sportsman, adult, young, adventure, adventuring, twenties, 20, s, 30, thirties, one, 1, person, kell