Climber’s last text precedes fatal fall from California’s 13,000-foot Mount Morgan

Brian Seibert sent a message around 7 p.m. Sunday saying he was headed down after summiting Mount Morgan. The 53-year-old climber never returned.

Search teams later found he had plunged off a cliff ledge near the base of Grand Central Couloir on the 13,000-foot California peak. His body was recovered more than 72 hours after the fall.

New York Post reporting detailed how Seibert failed to arrive as expected around 11:30 p.m. that same Sunday, Oct. 4. Mono County Sheriff’s Search and Rescue Team answered a missing report the next day and launched a major effort across rugged Mono County terrain.

Seibert had climbed alone, reached the summit, and signed the registry before starting his descent. What began as a peak-bagging trip ended in a fatal drop from a cliff band.

Rescuers treated the mission with urgency from the start. On Monday, Oct. 5, a Cal Guard CH-47 Chinook helicopter flew in and dropped teams at 12,500 feet so they could resume the ground search higher on the mountain.

Sudden deaths in remote Sierra country leave families and crews with the same hard work of recovery, much like the loss of a record-setting El Capitan climber in a Sierra Nevada accident.

Investigators and local experts pulled every available tool. They used photo topographic matching, extensive cell phone forensics, and a K-9 search of Seibert’s vehicle. Air crews scanned the slopes while ground teams looked for tracks.

Just after 1400 hours on Tuesday, Oct. 6, the Schooner crew spotted something from the air.

Mono County Search and Rescue stated:

“Just after 1400 hours [on Tuesday, Oct. 6], the Schooner crew identified an anomaly from the air near the bottom of Grand Central Couloir, which is a prominent east-facing gully off of the summit proper,”

Another team followed a single set of tracks down the couloir and reached the spot. They identified the anomaly as Seibert.

The terrain between his location and the nearest landing zone proved too difficult for a same-day recovery. Officials made the safety call to wait.

Mono County Search and Rescue explained:

“Due to the extremely challenging nature of the terrain between Brian’s location and the nearest landing zone, it was determined that there would be insufficient time to safely complete the recovery that [Tuesday],”

Early Wednesday, a Yosemite National Park shorthaul-capable helicopter 551 and its YOSAR crew brought Seibert’s body out. The volunteer wilderness rescue team and supporting agencies had worked through multiple days of high-elevation operations to close the search.

Handling remains after a remote fatality always carries weight for the crews who finish the job, a reality also seen when institutions face failures in the proper care of donated bodies.

A separate New York Post account confirmed Seibert sustained an unsurvivable fall from a cliff band at the base of the couloir. Officials described the drop in plain terms that left no question about the outcome.

Friends remembered him as an experienced peak bagger who had shared good times in the mountains. Darin Mitchell wrote on Facebook:

“We sure had some good times with that big mammoth family…the world is gonna miss you…rest easy, brian,”

The sequence shows how quickly conditions can turn on a solo descent. Seibert’s final text put him on the mountain after dark expectations. The fall itself occurred sometime after that 7 p.m. message during the way down. Exact timing of the plunge was not pinned down beyond the window between the text and the failed return.

Mono County’s response pulled in sheriff’s search and rescue, the volunteer Mono County Search and Rescue unit, Cal Guard aviation, and Yosemite’s specialized helicopter crew. Deployment at 12,500 feet and later shorthaul recovery underscored the scale required even for a single climber.

Losses that strike without warning in isolated places demand the same steady recovery work, whether the setting is a high peak or a distant post where American service members fell defending a base.

Grand Central Couloir drops east off the summit proper. The cliff ledge at its base became the end point of the tracks and the air spot. Rescuers noted the extreme challenge of moving anyone from that position to a usable landing zone before daylight and safety margins ran out on Tuesday.

Cell phone data, scent dogs, and helicopter observation narrowed the search until the anomaly appeared. Once the ground team confirmed identity, the focus shifted from finding to recovering under controlled conditions the next morning.

Bodies brought back after fatal incidents still require careful handling and closure for those waiting below, a step that follows every recovery from a crash site or vessel, including when the U.S. military recovered four after destroying a suspected trafficking boat.

Seibert was 53. He had summited the peak under his own power before the descent went wrong. No medical examiner details beyond the fatal fall appeared in the available accounts. Hometown information beyond his identification as a California climber also stayed unstated.

The full search stretched from the Monday report through Tuesday’s air and ground confirmation into early Wednesday’s extraction. Relative timing placed recovery more than 72 hours after the plunge. That span reflects both the mountain’s difficulty and the deliberate pace needed to keep rescuers safe.

Volunteer teams and military aviation assets turned out because one climber did not come home on schedule. Their work closed the case without further injury. The mountain offered no second chance once the ledge gave way.

High peaks reward preparation and punish the smallest misstep. When the margin disappears, only the recovery teams remain to finish what the climber started.