Stock photography, photos: A woman trail running Stock photos of A woman running in the back country near Donner summit, CA. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: Running, runner, run, training, high country, back country, action, active, effort, energy, liveliness, determination, momentum, motivation, aerobic, challenge, desire, freedom, woman, female, morning, evening, summer, California, sierras, alpine, granite, moon, horizontal, Outdoor, outdoors, outside, sports, sporting, sport, exercise, physical, fitness, outdoorsman, sportsman, adult, young, adventure, adventuring, twenties, 20, s, 30, thirties, one, 1, person