Ключевые слова: adult, athlete, athletic, camelbak, caucasian, cliff, climbing, closeup, competition, crosscountry, descent, downhill, endurance, exercise, hiking, jogger, jogging, male, man, marathon, mountain, one, outdoors, peak, poles, race, rock, run, runner, sky, sky running, skyrunner, skyrunning, sport, steep, sticks, top, track, trail, trail running, trekking, ultra,