Stock photography, photos: Running in the Sierra mountains Stock photos of A woman trail running in winter near Truckee, CA Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: running, run, runner, trail, woman, women, solo, alone, self reliance, endurance, enduring, speed, fast, effort, energy, momentum, motivation, back country, snow, winter, mountains, Athletic, athlete, Outdoor, outdoors, outside, sports, sporting, sport, exercise, health, healthy, physical, fitness, outdoorsman, sportsman, adventure, adventuring, twenties, 20s, 30s, thirties, one, 1, person, sobo