Daring Highliners Cross 800m Tightrope Between Mont Blanc Peaks: A Bold Vision Suspended Between Sky and Rock

On June 11th, 2025, a group of 14 highliners made history by successfully connecting and crossing a massive highline spanning between the Dent du Geant and Mont Mallet in the Mont Blanc massif near Chamonix. The French members of the team, including Aurelia Lanoe, Antoine Mesnage, and Camille Le Guellaut, utilized drones to aid in the installation of the highline at an altitude of 4,000 meters. It took them over two days to set the 19mm-wide, 788-meter-long line across the gulf, with a preliminary three-day preparation period beforehand. The French media, including Le Monde, reported on the achievement, highlighting the technical difficulty and the absence of any problems encountered during the crossing. The adventure community celebrated this feat as a milestone, with British climber and Everest guide Kenton Cool noting on social media that it represents "a bold vision suspended between sky and rock." Each step during the 45-minute crossing required razor-sharp focus, with the void below amplifying every heartbeat. Le Guellaut recalls, "Having walked between these two peaks still feels unreal." The 4,013-meter-high Dent du Geant is a prominent rocky spire above the Glacier du Geant, while the 3,989-meter-high Mont Mallet is less well-known and stands almost a kilometer away. Connecting these two peaks by climbing would have been challenging due to the crevassed Glacier du Geant and loose, unstable rock with no established route between them. Descending the Dent du Geant's steep, technical normal route (5.9) leads to the glacier, followed by a tough, uncertain ascent up Mont Mallet's mixed snow and rock slopes. This traverse would have taken expert, well-equipped climbers several days – hence their reliance on increasingly useful drone technology. The highliners spent eight months planning and a total of three weeks of grueling logistics, hauling 400 kilograms of gear over 29 trips without helicopters, honoring the spirit of traditional mountaineering. The 788-meter-long highline connecting Mont Mallet and Dent du Geant is a testament to their determination and skill. The team's achievement is a remarkable feat that pushes the boundaries of human endurance and technical expertise in the world of highlining. It serves as a reminder of the importance of perseverance, planning, and innovation in overcoming seemingly insurmountable obstacles in the face of nature's grandeur.