Golden-hour light rakes across Denali's snow-and-ice summit, rising above rolling Alaskan tundra ablaze in autumn colour. Low shrubs and dwarf birch sweep the foreground in crimson, amber and rust, while a braided glacier river winds through the valley, its pale turquoise water threading between grey gravel bars. Crisp, richly saturated colour and warm low sun give the whole scene a luminous, spacious calm.