An aerial crew is searching for a Colorado climber missing on Alaska's Mount McKinley, the National Park Service said.
There was no sighting of 41-year-old Gerald Myers of Centennial, Colo., during a search Thursday, said Maureen McLaughlin, spokeswoman for Denali National Park Service.
Myers began a solo climb to the summit of the mountain on Tuesday. He was last seen Wednesday as he climbed the ridge approaching McKinley's 20,320-foot summit.
A team traveling about two hours behind Myers did not see any signs of the man. He had skis with him, but little survival gear.
Mount McKinley is the tallest mountain in North America.