Ключевые слова: alpine, altitude, america, americanus, animal, background, big, billy, canada, cliff, climb, climbing, colorado, elevation, environment, evans, fur, glacier, goat, goats, going, high, horn, horns, kid, mammal, montana, mount, mountain, mountains, nanny, national, nature, north, oreamnos, park, road, rocks, rocky, rugged, sheep, snow, summer, sun, trail, white, wild, wilderness, wildlife,