Stock photography, photos: A backpacker on the summit Stock photos of A man celebrating after reaching the summit of a mountain in the Sierras. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: Backpacking, backpack, backpacker, high, back country, simplicity, inspiration, action, active, effort, energy, liveliness, determination, motivation, challenge, desire, adventure, freedom, optimism, playfulness, joy, fun, happy, pleasure, enthusiasm, alpine, hiking, distance, vista, grandeur, vastness, success, excellence, man, male, solo, self reliance, sierra, mountains, spring, summer, snow, California, white, orange, alpine, snow, summit, outdoor, outdoors, outdoorsman, outside, sports, sport, sportsman, recreation, recreational, exercise, exercising, physical fitness, one, 1, person, 20s, twenties, horizontal, Pres