After getting about 15 to 20 feet up, the man “came down of his own accord,” said Sgt. Eduardo Delgado, a spokesman for the U.S. Park Police.
The Park Police had sent negotiators to the scene.
No injuries were reported. The man was taken for mental evaluation, Delgado said.
It was not clear why the man was climbing the tree, which is a centerpiece of the annual Pageant of Peace.
A National Park Service spokeswoman said the site was closed and the tree lights would remain off until the service assessed damage.
According to a statement from the spokeswoman, Saturday’s holiday performance at the tree site, the last of the season, was cancelled.