At the upper edges of this zone the trees are twisted, grotesque, and hug the ground. Then the trees disappear altogether, in an alpine tundra - a harsh, fragile world. Here more than one-quarter of the plants you will see can also be found in the Arctic. Open 24 hours a day, year-round. In summer, you'll find sunny mornings with possible afternoon thunderstorms, and cool nights.
Winter brings cool to blizzard conditions with extreme temperature variations.
Weather conditions change quickly in mountainous areas and snow is possible year-round. Wear appropriate dress for each season. Wear comfortable clothing, dress in layers, bring rain gear, and sunscreen. Continue on Highway 34 to the north entrance, or Highway 36 to the south entrance, where park headquarters is located. The Golden Eagle Passport is an entrance pass to any national park, monument, historical site, recreation area, and national wildlife refuge that charges an entrance fee.