The red is dwarf birch (Betula nana). The gold is paper birch, balsam poplar and aspen.

The reddish patch above treeline is dwarf birch (Betula nana) and blueberry (Vaccinium).

A classic glacier-carved U-shaped valley.

Alpine tundra with red birch (Betula) and yellow willow (Salix).

Glacial erratics: Boulders carried and deposited by glacier.

Glacial arete: A narrow ridge between two glacial carved valleys.

Mt. Denali (Mt. Mckinley). The summit is 20,320 ft.

Dall (White) Sheep (Ovis dalli dalli).