Rescue workers late Saturday night carried a 52-year-old woman off Old Speck Mountain after she slipped and injured her leg, authorities said.

Nancy Carpenter of Dixfield had been hiking with her brother around noon about two-thirds up the Appalachian Trail in Grafton Notch State Park in Grafton Township when she fell, said Mark Latti, Warden spokesman at the Department of Inland Fisheries and Wildlife.

The two hikers were bound for Old Speck Lean-to to spend the night, said Game Warden Sgt. Rick Mills. They were about three miles from the nearest road when the injury occurred, Latti said.

Several hikers on the trial came upon Carpenter and notified emergency workers.

One of the hikers, Richard Zaccaro of Portland, was hiking with his son when he met Carpenter. She had tried to walk down a flat, wet rock when she lost her footing and slipped to the bottom into a root, he said.

Her leg looked broken, he said. “It was all twisted in a really ugly way.”

It was a perfect day for hiking but the trail was wet, Zaccaro said.

A warden and medical personnel arrived at the scene midafternoon, Latti said.

They determined that Carpenter wouldn’t be able to walk back down the mountain and would need to be carried, Latti said.

Wardens put out a call for volunteers. The nearly 40 responders included people from Mahoosuc Rescue; Outward Bound; Gould Academy; Tri Town Ambulance Service; and firefighters from Greenwood; Woodstock; Rumford; Mexico; Newry and Bethel and state park employees.

By 10:30 p.m., rescue workers using head lamps finally reached the bottom of the mountain with Carpenter in a litter, Latti said.