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Sierra Avalanche Center Report Blames Guides for Deadly Castle Peak Avalanche

03 April, 2026.Technology and Science.7 sources

Key Takeaways

Guides led a group into avalanche terrain under dangerous conditions; nine of 15 died.
Castle Peak near Lake Tahoe; this avalanche is the deadliest in modern California history.
Airbags worn by some victims failed to inflate during the avalanche.

Report Criticizes Guide Decisions

The Sierra Avalanche Center concluded the guides made key decisions that increased risk.

“THE FAMILY IS NOW SEEKING LEGAL ASSISTANCE FOR HIS CASE”

KCRA

The group of 15 was traveling below avalanche terrain but through a runout zone during a period when avalanches were likely to very likely.

KCRA

The group's size contradicted best practices to minimize avalanche exposure.

Seven of the 15 were killed despite wearing avalanche airbag backpacks, which were never deployed.

Failing Airbags and Equipment Malfunctions

Some victims wore avalanche airbags that did not deploy.

An equipment problem with a ski binding likely saved the lives of four survivors who fell behind the group.

National Today

The Nevada County Sheriff’s Office launched a criminal investigation into possible negligence.

Record Snowfall and Hazardous Conditions

The report documented one of the most dangerous snowpack configurations in half a century.

“A possible equipment malfunction may have sealed the fate of the group of backcountry skiers killed in February’s catastrophic avalanche near Lake Tahoe, which ranks as one of the worst snow disasters California’s history”