Deadly Avalanche in California’s Sierra Nevada: What Happened at Castle Peak
Nearly a week after a massive avalanche struck the rugged backcountry of California’s Sierra Nevada mountains, authorities have confirmed the identities of all nine victims. The incident is now considered the deadliest avalanche recorded in California and one of the deadliest in the United States in more than four decades.
The tragedy occurred on the morning of February 17, 2026, near Castle Peak, a remote area north of Lake Tahoe. A group of backcountry skiers was returning from a multi-day expedition during severe winter conditions when the avalanche struck.
What began as a recreational outdoor trip ended in devastating loss for families and communities across the region.
February 17, 2026: The Day of the Avalanche
In the days leading up to the incident, a strong winter storm brought heavy snowfall to the Sierra Nevada, creating unstable snowpack conditions.
Around 11:30 a.m. on February 17, a large slab of snow broke loose on a slope near Castle Peak and descended onto a group of skiers who were nearing the end of a three-day guided backcountry trip.
The avalanche was later classified between D2 and D3 on the avalanche danger scale, indicating it was powerful enough to bury, injure, or kill people.
The Expedition Group
The 15-person group included 11 clients and four professional guides from a Truckee-based outdoor guiding company. They had spent two nights at remote huts in the high country as part of their trip.
On the final day, as they began their return to the trailhead, the avalanche struck while many were exposed on an open slope during deteriorating weather.
Six members of the group survived. They were later located sheltering in place and were rescued once conditions allowed. Some sustained injuries but were expected to recover.
Recovery Efforts
Rescue teams faced extreme weather, deep snow, and ongoing avalanche risk in the days following the slide. The operation transitioned from rescue to recovery once it became clear that no additional survivors remained.
By February 21, officials confirmed that all nine victims had been recovered. Helicopters and ground crews were used to retrieve the bodies from the mountainous terrain.
Authorities later confirmed the identities of the victims, including three professional guides and six clients.
Identified Victims
Andrew Alissandratos, 34, of Verdi, Nevada (guide)
Carrie Atkin, 46, of Soda Springs, California
Nicole Choo, 42, of South Lake Tahoe, California (guide)
Lizabeth “Liz” Clabaugh, 52, of Boise, Idaho
Michael Henry, 30, of Soda Springs, California (guide)
Danielle Keatley, 44, of Soda Springs and Larkspur, California
Kate Morse, 45, of Soda Springs and Tiburon, California
Caroline Sekar, 45, of Soda Springs and San Francisco, California
Katherine “Kate” Vitt, 43, of Greenbrae, California
The three guides were trained and certified in professional avalanche and mountain safety standards. Several of the clients were longtime friends and active members of regional ski communities.
Conditions at the Time
The avalanche occurred during a powerful winter storm that had deposited significant snowfall in the region. Avalanche forecasters had warned of unstable snowpack and elevated danger levels.
High avalanche danger indicates that both natural and human-triggered slides are likely, particularly on steep terrain. Rapid accumulation of new snow on weaker underlying layers can cause sudden and catastrophic failure within the snowpack.
Even experienced backcountry travelers face increased risk under such conditions.
Search and Rescue Response
Multiple local and state agencies participated in search and rescue efforts. Teams used helicopters, snow vehicles, search beacons, and trained rescue dogs while navigating hazardous terrain and white-out conditions.
The Castle Peak area was temporarily closed following the incident to ensure safety and allow recovery and investigative work to continue.
Ongoing Investigation
Authorities have opened investigations to determine the full circumstances surrounding the avalanche. The review includes an examination of weather forecasts, avalanche advisories, route decisions, and safety protocols.
Officials have stated that conclusions cannot yet be drawn, as evidence collection and interviews are ongoing.
Community Impact
Family members and community organizations have expressed profound grief. The victims were remembered as dedicated professionals, outdoor enthusiasts, parents, partners, and friends.
Vigils and memorial gatherings have taken place across Northern California, Idaho, and the Lake Tahoe region as communities come together in support.
A Reminder of Mountain Risk
Avalanches are among the most serious hazards in backcountry winter travel. Changing weather, unstable snowpack, and terrain factors can quickly create life-threatening conditions.
Experts emphasize the importance of consulting avalanche forecasts, carrying proper rescue equipment, and making conservative decisions during periods of elevated risk.
The Castle Peak avalanche stands as a stark reminder of the power of nature and the unpredictability of mountain environments.
Conclusion
Nine lives were lost in the avalanche near Castle Peak — individuals deeply connected to their families, communities, and the outdoors. Recovery efforts have concluded, and investigations continue.
As loved ones mourn, the tragedy underscores both the beauty and the inherent risks of winter backcountry travel.
