National Park Service lifeguards and rangers found Alicia Scott Lee's body in a rocky area in the waters off Muir Beach Overlook at about 10:45 a.m., National Park Service Ranger George Durgerian said.
Rescue teams had resumed their search for Lee at about 8 a.m. today after searching Saturday as well.
Lee was reported missing at about 12:30 p.m. Saturday, though she was last seen nearly 12 hours earlier at about 1 a.m. near a bunker by Tennessee Beach after getting separated from her friends, according to Durgerian.
Authorities interviewed her friends and determined Lee appeared to somehow get briefly separated from the group overnight, Durgerian said. The friends told authorities they weren't sure she was missing until the morning.
Durgerian said there is no indication of foul play.
He said the Marin County coroner's office has been notified of the discovery of Lee's body.