The National Park Service said an aerial crew was looking for a climber missing on Mt. McKinley.
Denali National Park spokeswoman Maureen McLaughlin said there was no sighting of 41-year-old Gerald Myers of Centennial, Colo., during a search.
Myers began a solo climb to the summit of the mountain Tuesday. He was last seen Wednesday as he traversed the ridge approaching McKinley's 20,320-foot summit.