1. The Alaska Range stretches from Canada Yukon border in the east to the base of the Aleutian Range in the west.

2. The Alaska Range, pictured above, stretches from Canada's Yukon border in the east to the base of the Aleutian Range in the west.

3. Mt. McKinley in the Alaska Range is North America's highest peak at 20,320 feet and one of the greatest challenges for mountain climbers.

4. Hikers in Denali State Park, just east of the national park, take in awe-inspiring views of the Alaska Range.

5. A peak, ', 97. ' m (20,320 ft) high, in the Alaska Range of south-central Alaska. The highest point in North America, it was first scaled in 93.

6. A peak, 5,307 m (7,400 ft) high, in the Alaska Range of south-central Alaska.

7. Riding through slush, members of a team of three cyclists press on in their effort to traverse the rugged Alaska Range by mountain bike.

8. A peak, 5,307 m (17,400 ft) high, in the Alaska Range of south-central Alaska.