Stock photography, photos: A man mountain biking Stock photos of A man mountain biking in the Alabama Hills, CA. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: biking, mountain biking, bike, cycling, bicycling, training, back country, action, active, effort, determination, momentum, balance, steep, motivation, strength, strong, power, aerobic, challenge, desire, difficult, adventure, freedom, enthusiasm, sierra, mountains, distance, vista, risk, danger, extreme, radical, man, male, solo, summer, California, sierras, desert, horizontal, 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, Gant