ACADIA NATIONAL PARK — Officials at Acadia National Park are urging visitors to be careful this holiday weekend after four people were injured in separate incidents at the park Friday.

A 32-year-old-man from Chelmsford, Massachusetts, sustained non-life threatening injuries when he fell about 60 feet from the rock climbing area of Otter Cliffs to the ledges below Friday morning, park officials said. The man, who was with a private climbing group, was transferred onto a Coast Guard boat and eventually taken by LifeFlight to Eastern Maine Medical Center in Bangor.

Shortly afterward, rescuers were notified of an injured 60-year-old hiker off the Shore Path. Park officials, with the help of Mount Desert Island Search and Rescue, carried the Avon, Connecticut, resident off the trail and he was taken to Mount Desert Island Hospital for treatment of a lower leg injury, the park said.

In another incident, officials said an 18-month-old boy from Scarborough was injured when he fell on Acadia Mountain. The boy was evaluated by rescue personnel and taken to Mount Desert Island Hospital as a precaution. No other information was available on the Scarborough boy Friday evening.

Later Friday, a 24-year-old woman injured her shoulder when she fell off her bike while cycling on one of the park’s carriage roads. The woman was treated at a nearby hospital for her injuries, which were not considered serious.

Park officials say all hikers and climbers should know the basics of first aid because rescue personnel may not immediately be available if they’re responding to other incidents over this busy holiday weekend.