Stock photography, photos: A couple backpacking Stock photos of A couple backpacking high up in the North Cascades mountains. Photograph: © William Stevenson Click for a larger image and more information Keywords associated with this stock photo: Backpacking, backpack, backpacker, Wilderness, high country, back country, action, active, endurance, aerobic, challenge, adventure, alpine, hiking, vista, vastness, couple, friends, togetherness, man, woman, North Cascades, mountains, summer, lake, Washington, alpine, trail, horizontal, Luth Sido, outdoors, outdoorsman