steep mountain cliffs mountain snow fall serene valley floors mist over canyons sunlight through pines mountain autumn colors lush green ridges silent mountain trails deep forest mountain icy waterfall drops rustic mountain lodges highland fog scenes snowy tree tops mountain sunrise rays winding canyon roads rocky outcrop view majestic peaks horizon peaceful summit rest hidden alpine lakes mountain storm clouds starry mountain skies early frost on mountains mountain campsite fires tranquil ridge lines golden hour mountains