6 Climbers Lost, Presumed Dead

Climbers were on one of the most dangerous routes to the summit of Washington's Mount Rainer.
1:47 | 06/01/14

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Transcript for 6 Climbers Lost, Presumed Dead
another rescue effort that's taken a somber turn tonight in Washington state, where six climbers who had scaled Mt. Rainier, their last phone call was Wednesday. And then a signal from their beacon days later, some 3,000 feet below where they'd been. ABC's bazi kanani on what's believed to have been a deadly fall. Reporter: Tonight, no hope of rescue for six climbers on one of the most dangerous routes to the summit of Washington's Mt. Rainier, liberty ridge. All now presumed dead. This mountain is -- is dynamic and things change. There's snow bridges that can collapse. There's cornices that can give way. There's avalanches. Reporter: On Wednesday, a check-in call by satellite phone. The climbers at 12,800 feet. Then, silent until searchers spotted their camping gear on Saturday and detected those final pings from their emergency beacons more than 3,000 feet below. Rescuers say that type of fall down this rock face is not survivable. And the area too treacherous to retrieve the bodies. Very dynamic with rockfall, continuous rockfall and Reporter: The expedition was led by Matt Hegeman who climbed the mountain 50 times. The family of mark Mahaney says he was doing what he loved. Every time you turn around, you look on his Facebook page or you talk to him, he had the next big ice climb or mountain he was going to climb. Reporter: There are dozens of rescues on Mt. Rainier and an average of one death each year. But with six lost at once, this is now the worst disaster on the icy volcano in three decades. It's been a tough year for the company that organized the climb. Alpine ascents lost five sherpas in April among the 16 that died in that avalanche on Mt. Everest. David? All right, bazi, thank you.

This transcript has been automatically generated and may not be 100% accurate.

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