A powerful winter storm has been hammering Northern California this week—dumping heavy snow, whipping up strong winds, and creating the kind of unstable mountain conditions that backcountry skiers dread. On Tuesday, that danger turned into a full-scale emergency when a large avalanche swept through a guided ski touring group in the Castle Peak area near Truckee / Donner Pass, close to Lake Tahoe.
What happened
According to authorities and multiple reports, the avalanche hit around 11:30 a.m. Tuesday on a backcountry slope in the Castle Peak region. The group was reported to include 15 skiers total (including guides), and by Tuesday night six people had been reached and brought out—two of them taken to a hospital for treatment.
The number of people still unaccounted for has been fluid as officials worked to confirm headcounts in brutal conditions. By the latest updates carried by major outlets, nine people were still missing (after earlier reports that used different totals).
The rescue effort (and why it’s so hard)
Search-and-rescue teams have been trying to operate in exactly the conditions that make avalanches more likely: ongoing snowfall, wind-driven drifting, and poor visibility. Reports describe rescuers pushing in with specialized equipment and support from local partners, while survivors used basic emergency measures—like sheltering under a tarp and communicating as best they could—until help arrived.
This is also the nightmare scenario for responders: when avalanche danger stays elevated, every step into the terrain carries risk for the rescuers too.
Why avalanche danger was so high
The Sierra Avalanche Center warned that the backcountry risk was high, pointing to rapidly accumulating snow, wind loading, and weak layers in the snowpack—conditions that can lead to both natural avalanches and human-triggered slides large enough to bury people.
In plain terms: the snow wasn’t bonding safely, the storm was actively reshaping slopes, and the margin for error was extremely thin.
What to take away from this
It’s hard to read stories like this without feeling a knot in your stomach—because they’re a reminder that the mountains don’t care how experienced you are, how good your gear is, or how carefully you planned. Winter storms can turn “reasonable” terrain into a serious hazard fast.
If there’s one practical message that matters right now, it’s the same one avalanche forecasters repeat every season: when danger is high, the safest choice is often the least exciting one—staying out of avalanche terrain altogether, even if the powder looks perfect.
As officials continue the search and confirm details, this remains an evolving situation. I’ll be watching for the next briefing and any updated information about the missing skiers and conditions in the Castle Peak area.
