Jeff Lowe (real name : Jeffery George Lowe), born September 13, 1950, in Ogden, Utah, is a major figure and visionary in world mountaineering. From a very young age, he developed a passion for the mountains, learning skiing and climbing at an early age, influenced by a mountaineering family background. He became a fervent advocate of the "alpine style," characterized by small, mobile, lightweight, and self-sufficient teams, in contrast to the heavy and cumbersome expeditions then common. His extraordinary career includes more than a thousand first ascents in the American Rockies, the Alps, the Himalayas, and other iconic massifs. Beyond his exploits on the rock face, Jeff Lowe has profoundly influenced the climbing community with his technical innovations. With his brothers Greg and Mike, he founded the Lowe Alpine brand, famous for its revolutionary backpacks. He invented or improved essential equipment such as rigid crampons, anti-boot devices, Hummingbird ice axes, and, most importantly, the belay tube, which replaced the traditional figure-of-eight, becoming a worldwide standard. Subsequently, with the companies Latok Mountain Gear and Cloudwalker, he continued to develop cutting-edge mountaineering equipment. Lowe was also a pioneer in ice climbing and mixed climbing. In 1974, he made the first free ascent of a waterfall at Bridalveil Falls in Colorado, which he repeated solo. He created the "M" grade for evaluating mixed ice/rock routes, and in 1994, he signed the "Octopussy" route, a revolution in the difficulty of dry tooling. His routes, such as Moonlight Buttress in Zion, remain essential classics. One of the highlights of his career remains the attempt on the north ridge of Latok I, in Pakistan, in 1978, with his cousin George Lowe, Michael Kennedy, and Jim Donini. The team reached a historic point less than 150 meters from the summit, which remained inaccessible for a long time, before descending with Lowe, who was ill with dengue fever. This expedition is today considered an exemplary act of mountaineering, combining commitment, caution, and solidarity. During the 1980s, he opened major routes in the Himalayas, notably on Ama Dablam (first solo ascent on the south face in 1979), Kwangde Ri, Kangtega, and Tawoche. He also broke new ground in Europe, notably in 1991 with the winter solo ascent of the north face of the Eiger via a direct line called "Metanoia." This ascent, of extreme intensity and commitment, is a unique feat that will not be repeated until 2017. For Lowe, "Metanoia" is not only a sporting challenge, but also a profound existential quest. Throughout his life, Jeff Lowe worked to promote climbing and mountaineering, organizing events and competitions, introducing modern European climbers to the United States, and introducing ice climbing to the Winter X Games. He also founded the International Climbing School and actively participated in the Colorado Outward Bound School, passing on his knowledge and values ​​to several generations. Suffering from a degenerative neurological disease similar to ALS since the 2000s, Jeff Lowe courageously fought the disease until his death on August 24, 2018, in Fort Collins, Colorado.