A 17-year old boy in a week-long environmental education program was airlifted from Yosemite National Park after collapsing Monday afternoon on a popular trail.
Park spokesman Scott Gediman said the victim, from Upland in southern California, was near the top of the Upper Yosemite Falls trail about 3:30 p.m. when he collapsed from unknown causes.
After being examined by park rangers, he was taken by California Highway Patrol helicopter to Children's Hospital Central California, where he was being treated, Gediman said. The boy's name was not made public because of his age.
The boy was on a hiking trip with a group of students and several adult chaperones and instructors from the Yosemite Institute. The Upper Yosemite Fall trail is a 3.5-mile hike that begins in Yosemite Valley.