The hikers, both 15, were visiting the trail with Kennedy Catholic High School's cross-country team. They got stranded after attempting to mount Haystack, which is the summit of Mount Si.



The first teen was airlifted to Harborview with significant injuries after tumbling 90 feet and hitting his head. It took rescue crews several hours to reach him.



Ground teams, including teams on four-wheelers and a helicopter from Naval Air Station Whidbey Island, responded.



"There's quite a bit of terrain up there and can be difficult to manage," BJ Myers, a sergeant with the King County Sheriff's Office, said.



The wet weather proved too difficult for the all-terrain vehicles to manage. The helicopter struggled to cut through thick fog shrouding the mountain, but eventually reached the injured hiker.



"The helicopter didn't actually land," Myers said. "They lowered some medics down to the hiker, were able to stabilize the hiker and move them to a position where they could then be hoisted up to the helicopter."



The helicopter then left for Harborview Medical Center in Seattle.



The second hiker was uninjured and was able to walk down from the mountain.



Only KIRO 7 was there as the second boy walked out at the Mount Si trail head, surrounded by the search-and-rescue volunteers who went up to get him.



The teen, as well as the other group members, declined to talk about the experience.



The boys were hiking in a group of about 30 teenagers and adults from the school.