An avalanche near Castle Peak in California’s northern Sierra Nevada has claimed eight lives and left one skier missing, making it the deadliest avalanche in modern California history, according to Nevada County officials. The tragedy unfolded Tuesday during a guided backcountry skiing trip near Lake Tahoe, where rescue teams continue working in hazardous mountain conditions.
Authorities confirmed Wednesday that eight of the nine skiers reported missing after the avalanche have been found dead. Search efforts remain focused on locating the final missing skier, although officials say unstable snow conditions continue to pose significant risks for rescue crews.
Guided ski expedition caught in a massive avalanche
The accident involved a 15-person backcountry skiing group touring near the Frog Lake Backcountry Huts, outside Truckee, California. The expedition included four professional guides and eleven clients taking part in a three-day skiing trip.
Officials said the group was heading back toward the trailhead when a large slab avalanche swept across the slope. Six people survived the slide and activated emergency rescue devices, allowing authorities to begin a rapid search operation.
Two survivors were airlifted to hospital. One was identified as a guide with Blackbird Mountain Guides, the company leading the tour, while the remaining survivors were clients. Nevada County Sheriff Shannan Moon said the group consisted of nine women and six men, with survivors ranging from 30 to 55 years old.
Search teams faced dangerous mountain conditions
Authorities estimated the avalanche stretched approximately the length of a football field, burying sections of the backcountry route under deep snow.
Nearly 90 rescue personnel participated in the search despite heavy snowfall, strong winds and the continuing possibility of additional avalanches.
Chris Feutrier, supervisor of the Tahoe National Forest, warned that avalanche danger remains high across the region, making every stage of the recovery operation more difficult.
Weather created ideal conditions for a deadly slide
The Sierra Avalanche Center had already issued a Backcountry Avalanche Watch before the expedition because a powerful winter storm was rapidly increasing avalanche danger throughout the northern Sierra Nevada.
Weather observations showed nearly three feet of fresh snow accumulated near Donner Peak during the 48 hours before the avalanche. Some higher elevations received more than 60 inches of snowfall since Sunday, while ridge-top wind gusts exceeded 100 mph.
Snow scientists explained that repeated temperature changes earlier in the winter had formed weak layers of faceted snow beneath the surface. The heavy new snowfall and powerful winds created unstable slabs that could collapse under the weight of a skier.
Such conditions significantly increase the likelihood of large avalanches capable of carrying massive amounts of snow downhill within seconds.
Forecasters had warned of increasing avalanche danger
Avalanche forecasters cautioned that conditions would continue worsening as the storm moved through the Sierra Nevada. Experts conducting snowpack assessments had already triggered several smaller test avalanches while evaluating stability earlier in the week.
The disaster has prompted renewed discussion about the challenges of backcountry travel during periods of rapidly changing weather. Mountain safety professionals note that even experienced guides must continually reassess conditions because snow stability can change quickly during major storms.
Castle Peak attracts experienced backcountry skiers
Castle Peak stands just over 9,100 feet above sea level near Donner Summit, around 90 miles east of Sacramento and approximately 40 miles west of Reno. Its easy access from Interstate 80 has made it one of Northern California’s best-known backcountry skiing destinations.
The nearby Frog Lake Backcountry Huts have become increasingly popular since opening in late 2021, particularly during the Presidents Day holiday period when many Northern California schools observe winter break.
Unlike ski resorts that conduct avalanche control work, backcountry terrain remains unmanaged, meaning natural avalanche hazards are always present.
Recovery efforts continue
Sheriff Moon said severe weather remains the greatest obstacle for crews searching for the final missing skier. Officials acknowledged that, given the conditions and time that has passed, the operation is now focused primarily on recovery.
The Sierra Avalanche Center continues to warn of dangerous conditions through Thursday morning, with forecasts calling for up to 18 more inches of snow at higher elevations.
Backcountry safety depends on preparation and judgment
Experienced backcountry skiers typically carry avalanche beacons, probes, shovels, first-aid kits and emergency survival equipment. Some also use avalanche airbag backpacks designed to improve survival during a slide.
Safety experts emphasize that equipment alone cannot eliminate avalanche risk. Careful planning, avalanche education and checking official forecasts before entering uncontrolled terrain remain essential for reducing danger.
According to U.S. avalanche safety organizations, avalanches typically cause between 25 and 30 deaths across the country each year. The Castle Peak tragedy now stands as one of the most significant avalanche disasters in California’s recorded history.
For current avalanche forecasts and mountain safety information, visit the Sierra Avalanche Center. For more verified breaking news and weather coverage, visit our latest news homepage.
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