In one of the deadliest avalanches in recent U.S. history, a backcountry ski group in California’s Lake Tahoe region was struck by a massive avalanche, resulting in the deaths of eight skiers. The incident occurred near Castle Peak in the rugged terrain north of Interstate 80, near Donner Summit, during a guided ski expedition on Tuesday. The avalanche, which stretched across the length of a football field, left the group of 15 skiers with only six survivors, while one additional person is presumed dead, bringing the total number of fatalities to nine.
The victims were part of a closely-knit group, including both professional guides and clients. Among the victims, many were mothers of young athletes from the Sugar Bowl Resort’s youth ski team, a tragic aspect that has deeply affected the community. These annual trips, traditionally organized by the families themselves, were not affiliated with Sugar Bowl but have become an integral part of their lives over the years.
The avalanche struck on the third day of a guided backcountry trip run by Blackbird Mountain Guides, based in Truckee. The group had spent two nights at the remote Frog Lake ski huts and was returning to the trailhead when the avalanche hit. The group, which included 11 recreational skiers and four guides, was hit without warning, overwhelming them in mere moments. Despite the perilous conditions, six members of the group managed to survive by sheltering under tarps, enduring extreme weather conditions, including gale-force winds and heavy snowfall. Two survivors were later transported to the hospital with non-life-threatening injuries, while the others were rescued with the help of snowcats and skis.
This tragic event has left the community reeling, particularly at Sugar Bowl Academy, where multiple members of the ski group were affiliated. Stephen McMahon, the executive director of the Academy, expressed deep sorrow, acknowledging the profound emotional toll on families, the community, and the wider network of skiers who have lost loved ones. The academy’s leadership emphasized that the best way to support those affected was to offer care and time for grief.
Nevada County Sheriff Shannan Moon and other local officials, who led the extensive rescue operation, confirmed that efforts shifted from rescue to recovery as adverse weather conditions, including ongoing snowfall, made the terrain increasingly dangerous. Rescuers had to ski two miles into the backcountry to reach the survivors and begin recovery operations. Despite the high avalanche risk, the guide company, Blackbird Mountain Guides, has cooperated fully with authorities as investigations into the decision to proceed with the trip in the face of avalanche warnings are underway.
Experts have classified the avalanche as a D2.5 event on the Sierra Avalanche Center’s scale, indicating its considerable destructive potential. The slide occurred on a north-facing slope at an altitude of over 8,000 feet, and experts say a persistent weak snow layer had accumulated beneath the surface, contributing to the avalanche’s power. With over 30 inches of snow falling since the avalanche, the risk of further slides remains extremely high.
In the aftermath, California Governor Gavin Newsom has expressed his condolences, emphasizing the efforts of the emergency responders who risked their lives in difficult conditions. The avalanche has not only shaken the local community but has also raised awareness about the dangers of backcountry skiing, even for experienced skiers and guides. Authorities have urged caution in backcountry areas, with officials describing the conditions as “treacherous” and warning skiers to avoid similar terrain during the ongoing storm.
This devastating tragedy, which is the deadliest avalanche in the United States in over four decades, highlights the unpredictable nature of avalanches, even in areas known to skiers. Authorities and the community are focusing on supporting the victims’ families during this difficult time, while continuing the search for the final missing skier.

