Two bears walk across the tundra at Denali National Park and Preserve, Alaska. Becky Bohrer / AP
Two bears walk across the tundra at Denali National Park and Preserve, Alaska. Becky Bohrer / AP
Clouds obscure a portion of Mount McKinley in Denali National Park and Preserve. Becky Bohrer / AP
A green bus, the kind commonly used by hikers and other visitors to the park, waits to load up for a trip into Denali National Park.Bohrer) Becky Bohrer / AP