Stock photography, photos: A woman mountain biking Stock photos of A woman mountain biking down a dusty single track trail near Truckee, CA. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: biking, mountain bike, cycling, bicycling, single, track, training, back country, action, active, effort, energy, liveliness, endurance, motivation, strength, strong, power, aerobic, challenge, desire, difficult, adventure, dust, dusty, woman, female, solo, self reliance, silhouette, summer, California, sierras, white, backlight, backlit, vertical, helmet, Outdoor, outdoors, outside, sports, sporting, sport, exercise, physical, fitness, outdoorsman, sportsman, adventure, adventuring, twenties, 20s, 30s, thirties, one, 1, person, adult, young, adrenalin, excite, excitement, thrill, thrilling, Lanc