All 9 Skiers Died Trapped Under Castle Peak Snow

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New coroner reports have cleared up one part of the Castle Peak avalanche tragedy, and the answer is grim: all nine skiers died from asphyxiation after being buried in snow.

Quick Take

Officials said all nine victims in the Lake Tahoe avalanche died from **asphyxiation**, not traumatic injuries.
The avalanche happened on February 17 near Castle Peak, where a guided backcountry group was skiing.
A final avalanche report said the group traveled below avalanche terrain and through a runout zone during dangerous conditions.
The report still did not say for sure whether the slide was natural or triggered by the party.

Cause of Death Confirmed Months Later

According to partially redacted coroner reports released this week, all nine people killed in the February avalanche near Lake Tahoe died from asphyxia caused by burial in snow. That finding matters because avalanche deaths can come from more than one cause, including suffocation, blunt force trauma, and hypothermia. In this case, the official record shows burial was the fatal factor for every victim, even as some details remain hidden in the redactions.

The avalanche struck the Castle Peak area on February 17 during a backcountry ski outing that included guests and guides. Reporting at the time said six skiers survived and nine others were later confirmed dead, making it one of the deadliest U.S. avalanches in decades. The victims included three guides from Blackbird Mountain Guides, along with six guests on the trip.

What the Final Report Says About the Slide

The most important new detail comes from the final report released by the National Avalanche Center and summarized by ABC7 News. The report said the group traveled below avalanche terrain and through the runout zone during a period when a natural or human-triggered avalanche was “likely to very likely”. That is the kind of finding that raises hard questions about route choice, group judgment, and whether the party entered terrain with obvious danger signs.

The same report also said there were no broken trees visible in the debris and that investigators still could not tell whether the avalanche was triggered by the party or happened naturally. Other reporting said the cause of the avalanche may never be fully known because winter weather covered key evidence. That uncertainty does not change the fatal outcome, but it does matter for any broader debate about liability, safety practices, and decision-making in backcountry terrain.

Why This Case Hit a Nerve

The Castle Peak tragedy has drawn attention well beyond the skiing community because it touches two frustrations at once: the danger of high-risk recreation and the limits of official answers after disaster. The buried group included parents, friends, and professional guides, which made the loss feel especially personal in Northern California reporting. At the same time, the final report suggests the group was in terrain where avalanche danger was already elevated, even if the trigger remains unresolved.

That combination leaves the public with a familiar and uncomfortable split. One side sees a preventable exposure to obvious danger, while the other sees the harsh reality that avalanches can turn deadly fast and leave little physical evidence behind. The coroner’s findings settle how the victims died, but not every question about why the slide happened or who, if anyone, bears responsibility.