UPDATE: All climbers are now off Mt. Hood.
PORTLAND, Ore. - A climber was pronounced dead upon arriving at a Portland hospital on Tuesday afternoon.
The Clackamas County Sheriff's Office said the climber, a man, fell up to 1,000 feet near the summit of Oregon's tallest mountain.
The sheriff's office said an Oregon Army National Guard helicopter was called in to air lift the man from the Hogsback area of the mountain.
Deputies said up to eight climbers remain stranded on the mountain and that one has injuries that are not believed to be life-threatening.
Rescue teams are still working to reach those climbers.
Officials said conditions are treacherous on the mountain with rocks and ice falling.
Mount Hood is Oregon's tallest peak and attracts more than 10,000 climbers a year. Officials said the peak is notorious for loose rocks in warm weather.
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