The third hiker in a month has died after hiking Mt. Baldy trails Saturday, the coroner's office confirmed.

A 45-year-old San Diego man was killed after slipping while on the Devil's Backbone trail.

He fell 1,000 feet down the mountainside, the San Bernardino County Coroner's office said.

The San Bernardino County Sheriff's Department said a 911 call came in from a fellow hiker who saw the fall.

The sheriff's department launched a helicopter to search for the man, and transported him to Arrowhead Medical Center where he was later pronounced dead.

The coroner's office would release his name once his next of kin was notified.

Mt. Baldy is located in the San Gabriel Mountains in San Bernardino County.

The trails were closed Feb. 8 after two hikers died within a week. The trails were later reopened.

"When you get on the backside of those mountains, those trails are only about a foot and a half wide," Mike Ells of the San Bernardino County Sheriff's Department said. "They take one bad step, there's nothing to stop them."