Stock photography, photos: A muddy man mountain biking Stock photos of A muddy man taking a break while mountain biking near Truckee, CA. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: mountain, biking, bike, biker, cycler, cycling, bicycling, backcountry, active, effort, endurance, determination, motivation, balance, challenge, desire, difficult, adventure, freedom, man, male, solo, self reliance, spring, summer, yellow, mud, muddy, dirt, dirty, hydration, pack, outdoor, outdoors, outdoorsman, outside, sports, sport, sportsman, recreation, recreational, exercise, exercising, physical fitness, health, healthy, one, 1, person, 20s, twenties, athlete, athletic, muddy, mud, vertical, Pres