Trento, Italy — A tragic series of accidents across the northwestern Alps resulted in the deaths of nine climbers over a single weekend from June 12 to 14, 2026. This grim toll raises significant concerns for the upcoming summer climbing season, as unusually warm temperatures and rapid snowmelt have created perilous conditions on popular alpine routes.
The fatalities were reported on four renowned peaks, including Gran Paradiso in Italy’s Aosta Valley, Mont Blanc massif, and the Matterhorn. Despite generally favorable weather, with clear skies and warm temperatures, many climbers were drawn to high-altitude routes, leading to disastrous outcomes.
The deadliest incident unfolded on June 12 when a group of three experienced climbers fell from the north face of Gran Paradiso, Italy’s highest mountain entirely within its borders. The climbers, identified as Sergio Martinelli, 29, Maicol Zenatti, 39, and Antonio Sardano, 49, were all seasoned alpinists from Trentino. They were climbing a challenging route after departing from a mountain refuge early that morning. When they failed to return, search teams located their bodies later that evening, revealing that one climber lost their footing, triggering a fatal chain reaction.
On June 13, tragedy struck again when two siblings fell to their deaths while navigating the Kuffner Ridge on Mont Maudit. The brother and sister, aged 24 and 26, plummeted from a precarious section of the ridge. A nearby mountain guide quickly alerted rescue teams, who arrived to find the climbers had not survived the fall. Later that day, three more climbers suffered injuries on the same peak but managed to survive.
The same day, another fatal fall occurred on the Brenva Spur, where a skier from Haute-Savoie fell approximately 100 meters while navigating one of Mont Blanc’s steep descents. Rescuers arrived swiftly, but the skier was pronounced dead at the scene. Shortly thereafter, another climber died on the Italian route of the Matterhorn when they fell near Pic Tyndall. While the climber’s rope partner escaped unscathed, this marked another grim incident in what had already been a deadly weekend.
Rescue teams were stretched thin during this extraordinarily busy period, responding to numerous emergencies involving climbers experiencing exhaustion, injuries, and those stranded in tough terrains. By Saturday, the Chamonix-based PGHM rescue unit had already dealt with 11 separate incidents, highlighting the ongoing strain on emergency services in the region.
Conditions in the mountains have become increasingly unpredictable, officials noted, with warm temperatures and accelerated snowmelt leading to risks more typical of mid-summer rather than early June. Normally firm snow surfaces have been replaced by treacherous bare ice, significantly heightening the challenges faced by climbers. This shift in conditions, along with the loosening of permafrost, has created a more hazardous environment, with many climbers unaware of the inherent risks.
On June 14, the situation worsened when two climbers fell about 100 meters near Monte Pasubio, bringing the weekend’s total fatalities to nine. The tragic events serve as a stark reminder of the dangers of mountaineering, particularly during periods when weather conditions are misleadingly benign.
Authorities are emphasizing the importance of thorough preparation, proper gear, and realistic self-assessment, particularly on challenging terrain where escaping can be difficult. The weekend’s fatalities have reignited discussions on the risks associated with high-altitude climbing, particularly during early summer when conditions can shift unpredictably. With 2025 marking Italy’s deadliest year for mountain accidents, officials are bracing for another challenging climbing season ahead.