Castle Peak avalanche: Eight dead, one missing after guided backcountry tour hit by massive Sierra Nevada avalanche
Castle Peak, California (High Desert News Online) – Eight backcountry skiers were killed and one is missing after an avalanche struck a guided Blackbird Mountain Guides party near Castle Peak in the Sierra Nevada on Feb. 17, 2026, during a major winter storm and whiteout conditions.
- Fatal toll: Eight confirmed dead, one missing and six survivors from a 15-person guided party; three of the four guides are believed to be among the deceased.
- Timing and weather: The slide struck around 11:30 a.m. as the group neared safety amid a storm that dumped roughly six feet of snow and produced whiteout conditions.
- Rescue and recovery: Survivors sheltered for hours; rescuers reached them about six hours later and operations shifted from rescue to recovery due to hazardous conditions.
- Investigation: Authorities will review whether guides had access to avalanche warnings and followed company policies amid rising avalanche danger and official warnings.
What happened
A 15-person party — four guides and 11 guests traveling with Blackbird Mountain Guides — was returning from a three-day ski mountaineering course based at the Frog Lake Huts when disaster struck. The group began descending on the morning of Feb. 17 during a major winter storm that produced heavy snowfall and whiteout conditions.
At about 11:30 a.m., while moving through steep near-vertical terrain and with visibility reduced, someone in the party yelled “Avalanche!” and a slide the size of a football field swept down and overtook the group. Capt. Russell “Rusty” Greene of the Nevada County sheriff’s office said the party had little time to react.
“The group had little time to react,” Capt. Russell “Rusty” Greene said as rescuers and investigators described the rapid, catastrophic slide.
Survivors recovered three bodies immediately and sheltered in place for roughly six hours until rescuers could reach the scene. Teams reached survivors at about 5:30 p.m. that day; ongoing hazardous weather and terrain have delayed full recovery efforts.
Victims, guides and training
Officials said the group included adults aged roughly 30 to 55. Of the 15 people on the tour, six survived — five women and one male guide — while eight were confirmed dead and one remained unaccounted for and presumed dead. Three of the four guides are believed to be among the deceased.
Blackbird Mountain Guides’ founder Zeb Blais told reporters the guides were trained and certified through the American Mountain Guides Association and served as instructors with the American Institute for Avalanche Research and Education, highlighting their professional credentials amid questions about what information the guides had before and during the trip.
Some victims had ties to Sugar Bowl Academy, a boarding school and ski program on Donner Summit; school officials acknowledged connections but did not release names. One deceased person was married to a member of the Tahoe Nordic rescue team, a volunteer group that assisted in search efforts.
Weather, forecasts and avalanche warnings
Meteorologists had forecast heavy snowfall in the days before the tour. The storm dropped roughly six feet of snow in parts of the Sierra, creating unstable layers in the snowpack and pushing avalanche danger from moderate and considerable toward the high range.
On the morning of Feb. 17 at 6:49 a.m., the Sierra Avalanche Center issued an avalanche watch warning that large avalanches were likely in 24–48 hours and later upgraded it to a formal warning, advising that travel in avalanche terrain was not recommended. It is not yet clear whether the guides had learned of the upgrade before they began their descent out of the wilderness.
Investigation and accountability
Nevada County Sheriff Shannan Moon said investigators will examine the decision to proceed despite the forecast and warnings. The review will include communications, weather briefings, and whether guides and the outfitter had internet access or other ways to receive timely updates from the Sierra Avalanche Center and other weather services.
Investigators will also review company policies and risk assessments used by Blackbird Mountain Guides before and during the trip. Key questions include whether guides had current avalanche bulletins and whether standard protocols for canceling or altering trips in high-danger conditions were followed.
Search-and-rescue and recovery challenges
Storm conditions and deep snow slowed recovery operations and complicated efforts by volunteer and professional teams. Local volunteer groups, including mountain rescue teams and Tahoe Nordic personnel, assisted at the scene and helped move survivors to safety. Given the size of the slide and near-vertical terrain, recovery teams have had to balance retrieving victims with rescuer safety in unstable conditions.
Why this matters now
This Castle Peak avalanche is the deadliest U.S. avalanche in nearly 50 years. The tragedy raises urgent questions about how commercial guiding operations, avalanche forecasting centers and clients share information and make go/no-go decisions in rapidly changing winter storms — issues that matter to communities dependent on winter tourism and outdoor recreation.
Implications for The High Desert, California
Economic impact
Outdoor recreation drives much of the regional economy. An event of this scale may reduce bookings for guided trips, lessons and local lodging as clients seek assurances about safety. Local outfitters could face increased scrutiny from customers and insurance carriers.
Political consequences
County leaders may face pressure to review permitting, safety standards and enforcement for commercial guide operations. While many communities favor limited regulation, public safety and liability concerns could lead to targeted rules, reporting requirements, or enhanced communication standards between avalanche centers and commercial operators.
Social effects
The High Desert is closely tied to the Tahoe and Sierra recreation community. Losses reverberate through schools, clubs and volunteer rescue teams. Counseling resources, memorials and community support will be important for grieving families and first responders.
Cultural relevance
Backcountry skiing and mountaineering are central to local identity. This tragedy may prompt renewed conversations about balancing adventure and risk, and the responsibilities of guides and clients to heed avalanche advisories — a dialogue that will touch on values of personal freedom, self-reliance and community care.
Practical applications for residents and outfitters
- For guides and companies: review communication plans to ensure real-time access to avalanche center upgrades, keep logs of weather briefings and client briefings, and adopt conservative cancellation policies when warnings are posted.
- For backcountry users: carry and know how to use avalanche rescue gear, check avalanche center bulletins before and during trips, and consider deferring travel below tree line or outside avalanche terrain when a warning is posted.
- For local officials: consider targeted measures to improve information sharing between forecasting centers and commercial operators without imposing sweeping regulations that harm small businesses.
Reporting and sources
This article draws on reporting by High Desert News Online, statements from the Nevada County sheriff’s office, and local coverage. Key published sources include Los Angeles Times coverage and local video reporting summarizing scene details and rescue timelines.
