Seven alpinists died in a catastrophic 24-hour period across the northwestern Alps on June 12 and 13, 2026, marking the worst single weekend in the mountains so far this year. The fatalities stretched rescue services across France and Italy and raised urgent concerns about the summer climbing season ahead, as warm temperatures and accelerated snowmelt created unusually hazardous conditions on classic alpine routes.
The deaths occurred on four of the Alps’ most famous peaks: Italy’s Aosta Valley hosted a tragedy on Gran Paradiso, while the Mont Blanc massif saw fatalities on both Mont Maudit and the Brenva Spur, with an additional death on the Matterhorn’s Italian normal route. Most accidents happened despite generally favorable weather conditions, with clear skies and warm temperatures drawing large numbers of climbers to high-altitude routes.
Gran Paradiso Claims Three Lives
The weekend’s deadliest single accident occurred Friday, June 12, on the north face of Gran Paradiso, Italy’s highest mountain located entirely within Italian territory at 4,061 meters. A trio of experienced alpinists from Trentino plunged roughly 400 meters at an elevation near 3,600 meters during their attempt on the demanding route.
Authorities named the deceased as Sergio Martinelli, 29, an economist and data analyst from Trento; Maicol Zenatti, 39, an IT professional from Brentonico; and Antonio Sardano, 49, a veteran emergency medical worker with Trentino Emergenza. The three were close friends who shared a passion for mountains and had been characterized by family members and acquaintances as thoroughly prepared climbers who knew the route well.
The group had departed from Rifugio Federico Chabod in Valsavarenche around 3 a.m. Friday and planned to return to the refuge that evening. When they failed to arrive as scheduled, concerned relatives contacted authorities at approximately 7:30 p.m., prompting search teams to discover the bodies on the mountain’s north face using a GPS locator activated by one of the party members. According to initial reconstructions by the Soccorso Alpino Valdostano, it appears one climber in the roped party lost footing, pulling the others down with him. Authorities have not yet determined exactly what caused the initial fall.
Siblings Die on Mont Maudit’s Kuffner Ridge
The following morning delivered another disaster as two siblings from Savoie, France, aged 24 and 25, plummeted to their deaths while climbing the Kuffner Ridge on Mont Maudit. The route is one of the most demanding in the Mont Blanc massif, a classic but exposed mixed climb known for knife-edge sections and high commitment.
The brother and sister plunged from an exposed portion of the ridge at approximately 6 a.m. on Saturday, June 13. A Slovak mountain guide climbing in the area heard falling rocks and immediately raised the alarm. The PGHM mountain rescue unit from Chamonix responded within minutes but discovered that neither climber had survived the fall.
Mont Maudit nearly claimed more victims that same day when, shortly before noon, another trio of alpinists tumbled on the identical peak. Remarkably, all three survived with injuries and were assisted by rescue teams.
Fatal Fall on Brenva Spur
A third fatal accident occurred Saturday afternoon on the Italian side of Mont Blanc. A 44-year-old skier from Haute-Savoie fell approximately 100 meters while skiing the Brenva Spur, one of the mountain’s classic steep ski descents. His ski partner witnessed the accident and immediately alerted rescuers.
A Dragon 74 rescue helicopter and medical personnel were dispatched to the scene, but the skier was declared dead when they arrived. The victim’s body was transported to Entrèves as investigators from the Alpine Rescue Police unit (SAGF) launched an inquiry into the circumstances of the accident.
Matterhorn Death Near Pic Tyndall
Another deadly accident unfolded Saturday on the Italian normal route of the Matterhorn, known locally as the “Grande Becca.” The climber fell several hundred meters near Pic Tyndall, a 4,241-meter subpeak along the Italian ridge leading to the mountain’s summit. His rope partner was uninjured and was later brought to safety by rescue crews. Authorities have not released the victim’s identity or nationality.
Rescue Services Overwhelmed
The deaths occurred during an especially hectic stretch for mountain rescue teams across the region. By Saturday evening, the Chamonix-based PGHM rescue unit had handled 11 separate emergencies involving exhausted climbers, traumatic injuries and mountaineers stranded in difficult terrain. The operations required coordinated efforts from Italian, French and Swiss rescue crews, who were responding to multiple incidents at the same time.
What makes experienced rescue coordinators most uneasy about the weekend is that most accidents on June 13 happened in good weather. The conditions were not obviously hostile—skies were largely clear, temperatures warm, and early-season visitor numbers were already climbing toward their summer peak. Yet the falls kept coming.
Early Snowmelt Creates Hazardous Conditions
Rescue officials in the Aosta Valley and Chamonix have pointed to the same underlying cause: warm temperatures and an accelerated seasonal snowpack melt are creating conditions more typical of mid-summer than mid-June. Low winter snowpack has exposed bare ice weeks earlier than normal, fundamentally changing the character of classic routes.
Terrain that would normally carry a layer of firm neve in mid-June is now showing bare, compacted glacier ice. Ice is far less forgiving than consolidated snow—a slip at 50 degrees on ice accelerates into a fall before a climber can bring an axe to bear. Warming temperatures are also loosening permafrost and ice bonds, making even well-known routes more unpredictable in early summer.
Rescue teams have indicated that conditions can change rapidly, and what looks stable in the morning can become hazardous by afternoon. Rapid snowmelt and rockfall have increased on technical routes this season. Many climbers this weekend appeared drawn by the lure of a perfect weather forecast after a long winter, but the favorable skies masked the deteriorating conditions underfoot.
Weekend Toll Rises to Nine
The toll increased on Sunday, June 14, when two climbers fell about 100 meters in the Sojo d’Uderle area on the Vicenza side of Monte Pasubio in the Italian Prealps, a subrange of the Alps. A third climber in their group was rescued while still roped to the face. Foggy conditions hampered initial efforts and complicated the rescue, bringing the weekend’s total fatalities to nine.
The seven deaths in the initial 24-hour period represent one of the most serious tolls in recent years for mountaineering in the western Alps. The grim weekend comes as Alpine rescue services brace for another busy summer after Italy recorded its deadliest mountain year on record in 2025. Last year, 528 people died in Italy’s mountains, with falls accounting for nearly half of all fatalities.
According to Italy’s CNSAS mountain rescue service, slips and falls accounted for nearly half of all mountain deaths in 2025. This weekend’s fatalities followed that same pattern—every confirmed death resulted from a fall, with no avalanches or storms involved. Despite the attention given to avalanche accidents each winter, summer climbing, hiking, and mountaineering accidents consistently claim far more lives across the Alps.
Authorities continue to stress the importance of proper preparation and equipment, thorough route research, and realistic assessment of personal limits, particularly on exposed terrain where retreat can be difficult. The tragic weekend has rekindled attention on the risks of high altitude at a time in the season characterized by particularly delicate weather and snow conditions.