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A deadly backcountry avalanche near Lake Tahoe has shaken the Sierra, leaving eight people dead and one still missing after a guided group was caught in extreme conditions near Castle Peak. It’s a painful reminder that avalanche risk is real, especially after major storms. Here’s what we know, plus practical warning signs to watch for if you’re traveling to snowy mountain areas this winter.
On Feb. 17, 2026, an avalanche buried a group of 15 backcountry skiers near the Frog Lake huts in the Castle Peak area north of Truckee, close to Donner Summit. Six people were rescued. Eight died. One person was still missing in early reporting as search efforts were repeatedly complicated by dangerous weather and continuing avalanche conditions.
Officials had placed the region under a high-danger warning during the storm cycle, urging people to avoid backcountry travel while conditions remained unstable.
If you’re reading this while planning a Tahoe weekend, a ski trip, or a winter road trip across the Sierra, this is the moment to slow down and treat avalanche information the way you’d treat a wildfire map or hurricane cone. It’s not just for experts. It’s for anyone heading into snow country.
This isn’t only a Tahoe story. Days earlier, two Belgian ski tourers were killed by an avalanche near Airolo in Switzerland’s canton of Ticino. The slide was reported between Pizzo Centrale and Pizzo Prevat. A third skier who was buried managed to escape unharmed, and Swiss authorities noted heightened avalanche danger in the Alps after heavy snowfall.
Different mountains, same lesson: storms, wind, and weak layers can turn a beautiful slope into a trap quickly.
Avalanches don’t just happen out of nowhere. Most start when a firm layer of snow is sitting on top of a weaker, fragile layer underneath. Think of it like stacking a heavy book on top of a loose pile of papers. Everything can look fine, until something nudges it.
That nudge might be fresh snowfall, strong winds piling snow onto one side of a slope, a burst of warm sun, or even a single skier crossing the hill. If the weak layer gives way, the heavier snow above it can crack and slide downhill all at once.
Experts say it’s usually a combination of factors lining up at the wrong moment: the slope is steep enough, the layers are unstable enough, and something provides a trigger. From the outside, the mountain can look calm and beautiful. Then, in seconds, it isn’t.
If you remember nothing else, remember this: avalanches are most likely right after storms, during heavy wind loading, or during rapid warming. Here are the clearest red flags to watch for:
Active Warnings And “High” Danger Ratings
If an avalanche center is issuing a warning or rating danger as high, treat that like a closed road sign. Plans can change. A powder day isn’t worth gambling on a forecast that’s telling you travel isn’t recommended.
Recent Avalanches In The Area
If slides are happening on nearby slopes, that’s the mountain giving you information. Recent avalanche activity is one of the strongest indicators that the snowpack is unstable.
Cracking In The Snow Or A Sudden “Collapse” Feeling
If cracks shoot out from your skis, board, or boots, the snow may be fracturing as a slab. A hollow, collapsing feeling underfoot is another serious warning sign.
Heavy New Snow, Rain-On-Snow, Or Rapid Loading
A big snowfall in a short window adds weight fast. Rain can do the same. Either can overwhelm weak layers below the surface.
Strong Wind And Smooth “Pillowy” Drifts
Wind can load slopes even without fresh snowfall, building dense slabs that can fracture with a single rider. Watch for fresh drifts, cornices, and that smooth, rounded, pillowy look on leeward slopes.
Rapid Warming And “Too-Wet” Snow
If temperatures spike or the sun turns intense, the snowpack can weaken quickly. Slushy conditions and rolling snowballs moving downhill can signal that the snow is losing strength.
If your trip is resort-based, stay inbounds and follow patrol closures. Avalanche deaths are far rarer within managed resort terrain than in the backcountry because patrol teams monitor conditions and perform avalanche control work.
If your plans involve touring, snowshoeing, or even “just a quick hike” near steep bowls, chutes, or treed slopes, treat avalanche forecasts as required reading. The Tahoe incident unfolded during a storm cycle when officials were explicitly warning about dangerous conditions.
Even if you’re not planning to ski in the backcountry, these basics are worth thinking about in remote winter areas:
A fully charged phone and backup battery, kept warm since cold drains batteries fast
Offline maps in case you lose service
Location sharing with someone who isn’t on the trip
If you’re heading into unpatrolled terrain away from ski resorts, proper avalanche gear is essential: a transceiver, probe, shovel, and the training to use them quickly under stress.
If you aren’t trained, the safest choice is to stay out of avalanche terrain entirely. Gear without skills isn’t a safety plan.
Most of us head to the mountains for the same reasons: the fresh air, the wide-open views, the chance to step outside our routines and spend time with people we care about. That instinct to go is normal, and it’s part of what makes winter travel so appealing in places like Tahoe and the Alps.
At the same time, winter conditions are never fixed. Snow layers shift beneath the surface, storms add weight to the slopes, and wind quietly reshapes terrain in ways that aren’t always visible from a trailhead or lift line. What felt stable yesterday can change overnight, sometimes without obvious warning.
Paying attention to those shifts isn’t about fear; it’s about awareness. Checking forecasts, respecting closures, and adjusting plans when conditions call for it are simply part of traveling responsibly in mountain environments. The mountains will still be there next weekend and next season. The goal is to experience them in a way that allows you to return again and again, with good memories and everyone safely accounted for.
What happened in the Tahoe avalanche in 2026?
On February 17, 2026, a backcountry avalanche near Castle Peak north of Truckee buried 15 skiers. Six were rescued. Eight died. One was initially reported missing during early search efforts.
Was the avalanche inside a ski resort?
No. The slide occurred in backcountry terrain outside managed resort boundaries.
Where did the avalanche happen?
It happened near the Frog Lake huts in the Castle Peak area, close to Donner Summit in the Lake Tahoe region.
Why are avalanches more common after storms?
Storms add weight to the snowpack quickly. Wind can also create dense slabs. When that load sits on a weaker layer, the slope is more likely to fail.
What slope angles are most dangerous?
Most slab avalanches occur on slopes between about 30 and 45 degrees, which is also common ski terrain.
What are the clearest avalanche warning signs?
High or extreme danger ratings
Recent avalanches nearby
Cracking or collapsing snow
Heavy new snowfall
Strong wind loading
Rapid warming
Multiple warning signs mean it’s time to turn around.
Is it safe to ski at Tahoe resorts during avalanche danger?
Risk is much lower inside resort boundaries because ski patrol conducts avalanche control work. Always respect closures and stay inbounds.
What gear is required for backcountry skiing?
Standard safety gear includes a transceiver, probe, and shovel, along with proper avalanche training.
How do I check avalanche conditions before a trip?
Review the local avalanche center forecast and monitor weather conditions for new snow, wind, and rapid temperature changes.