Jessica Biel Weeps at Mt. Kilimanjaro Summit

Jessica Biel Weeps at Mt. Kilimanjaro Summit
The Summit group atop Mt. Kilimanjaro
Michael Muller

01/13/2010 AT 06:35 PM EST

Reaching the top of 19,340-foot Mt. Kilimanjaro proved to be an emotional experience for Jessica Biel and Emile Hirsch, who climbed
 Africa's tallest peak to raise awareness of the global water crisis.

 walked over to Jessie and gave her a big hug," UN Foundation executive
 Elizabeth Gore, who also made the hike, tells PEOPLE via satellite phone. "The two of us embraced and
 we just cried. Every single one of us was in absolute tears."

"The temperature was zero degrees and so many people were struggling," she adds. "People had hurt limbs, people had altitude sickness."

After six days of climbing, the final stretch of the mountain Tuesday proved to be
 the most arduous. "We had a complete whiteout," says Gore. "There was so much
 snow, we could only see two or three feet in front of us. So we had to line
 up like a chain to make it to the final point. I'm so proud that every single one of us 12 climbers made it."

Once the group of climbers – which included Ethiopian-born Kenna and 
environmentalist Kick Kennedy, granddaughter of Robert F. Kennedy – reached
 the summit, they quickly had to begin their descent.

 way down is so steep," says Gore. "And we had ice, so you're stepping
 sideways, trying not to slip. And we hit big boulders, so we had to
 hop-skip. We had major knee issues."

After eight days of hiking, the group finally reached the town of Arusha,
 Tanzania at the base of the mountain on late Wednesday. They planned to
 celebrate with a hot meal at a local restaurant and to toss back a few 
bottles of the local Tanzanian beer.

On Thursday, Jessica Biel, Kenna and rapper Santigold will join Gore on a
 trip to a United Nations camp in Ethiopia to see some of the 
world's most significant water problems. "We are all so tired, dirty and 
bruised," says Gore, "but we re trying to give a voice to people who don't
 have any."

For complete coverage of the expedition visit

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