YELLOWSTONE NATIONAL PARK, Wyo. (AP) — The National Park Service says an 18-year-old woman has died after falling 400 feet in the Grand Canyon of the Yellowstone.

The Park Service says she was a Yellowstone concession employee on her first day in the park. She was hiking a canyon trail with three other acquaintances when she ventured off trail onto a loose rock promontory, which gave way underneath her.

The accident occurred near Inspiration Point Thursday afternoon. Her body was retrieved Friday.