STATELINE, Nev.—The search for a missing California woman who disappeared on New Year's Eve at Lake Tahoe ended Friday when her body was found behind a snow bank, authorities said.

Foul play is not suspected.

Alyssa Byrne, 19, of Petaluma, was in South Lake Tahoe with friends over the holiday to attend the Snow Globe music festival. They were staying at the Horizon Casino Resort in Stateline.

Douglas County Sheriff's Sgt. Pat Brooks said a utility worker found Byrne's body around 8:30 a.m. Friday along Pioneer Trail, between Black Bart and Al Tahoe.

Authorities suspect Byrne may have tried to walk back to her hotel after the concert and became disoriented or lost, Douglas County Undersheriff Paul Howell said.

There were long lines for shuttle buses and other concertgoers decided to walk back, he said. But Byrne never arrived at the hotel.

Nighttime temperatures have plunged to zero in the past week, with daytime highs still well below freezing.

Authorities said her body was just off the roadway but obstructed from view by the snow bank.

A cause of death was not immediately known and an autopsy was pending.

A woman who answered the phone at Byrne's home in Petaluma declined comment, saying "We're not taking any calls now."

The discovery ended a dayslong effort by search and rescue teams, friends and family members who put up flyers and urged anyone with information on the young woman's whereabouts to come forward.