ACADIA NATIONAL PARK – A woman who fell about 15 feet after a pile of rocks gave way beneath her was in fair condition Sunday at a Bangor hospital.

The accident occurred at about 4 p.m. Friday, when Brooke Boncher was climbing on the ledges between Sand Beach and Thunder Hole with a group of people, Acadia National Park Ranger Richard Rechholtz said.

She jumped over to a pile of rocks that proved to be unstable. It came loose, sending her about 15 feet toward the ocean, he said.

About a dozen park rangers used a litter to retrieve Boncher and bring her back toward the Park Loop Road, where an ambulance was waiting.

A LifeFlight helicopter landed near the beach to take her to Eastern Maine Medical Center in Bangor. She was in fair condition Sunday afternoon, according to a nursing supervisor said.

Rechholtz said Boncher, whose age and residence were unknown, appeared to have suffered an open fracture to her leg.

Her fall was the third rescue in within a week’s time for park rangers.

On Thursday, 25 people helped rescue Sydney Levin, 59, of Chicago from Cadillac Mountain’s South Ridge hiking trail after he suffered pain in his chest, arms and jaw.

On Wednesday, a woman fractured three vertebrae in her neck after losing control of her bicycle on Day Mountain.

Rechholtz said Linda Schear, 49, of Quebec may have hit her head on a rock when she fell onto the carriage road. Her helmet was cracked and she complained of neck pain.

Rescuers used a collar and a backboard to stabilize Schear, who was taken by LifeFlight helicopter to Eastern Maine Medical Center.

On Sunday, a hospital spokeswoman had no information about Schear, except that she was no longer a patient at the facility.