Ключевые слова: aspen leaves, aspen trees, aspens, autumn, back country, blue sky, brilliant, clouds, colorado, colorado high country, fall, fall colors, fall drives, fall trips, green, leaves, mountain slopes, mountains, nature, orange, outdoors, pine trees, puffy clouds, recreation, rocky mountains, scenic, scenic byways, scenic drives, slopes, trees, united states, vacations, white puffy clouds, yellow,