Mount McKinley is North America's highest mountain. It is located in Alaska.
Mizuki Takahashi, 36 and Brian Massey,27, were both killed when they fell to their death.
Mizuki was a veteran climber who was born in Japan but moved to Seattle about 5 years ago. She was pronounced dead about 8 p.m. Thursday. Massey was a firefighter who was taken back to a ranger's tent for treatment but he never regained consciousness and died at about 9:30 a.m. Friday.
The two were roped together when the fall happened.
The fall was witnessed by members of the mountaineering ranger patrol at the 17,200-foot level. They fell from the 19,000 foot mark.
The bodies have not been recovered yet because of bad weather.
Several firefighters were getting ready to fly to Anchorage to accompany Massey's body back to Washington.
Massey is survived by his wife Jessica.
Takahashi worked in the medical field and also served as a guide for The Mountaineers.