The Ultra-Trail du Mont-Blanc (UTMB) is an annual mountain ultramarathon held in the Alps. It covers approximately 171 kilometers (106 miles) and includes a total elevation gain of around 10,000 meters (32,800 feet). The race typically takes place in late August and attracts thousands of runners from around the world. The course circles the Mont Blanc massif, passing through three countries: France, Italy, and Switzerland. Participants must navigate challenging terrain, including steep ascents and descents, while experiencing breathtaking alpine scenery. The UTMB is considered one of the most prestigious ultramarathons globally, showcasing endurance and resilience.