Rangers responded to an emergency call at the Elkmont Campground in Tennessee at 12:30 a.m. Wednesday, the park said in a press release.
A large red maple tree about 2 feet in diameter fell on the family’s tent, the release said. The girl’s father and two siblings were not injured.
The park closed the campground and adjacent campgrounds as a precaution, officials said.
Great Smoky Mountains National Park spans the border between North Carolina and Tennessee. It is known for its diversity of plant and animal life and is the most visited national park in the country, according to the website.