Ultra Trail Grand Colombier - 10 km 2026

Ultra Trail Grand Colombier is a mountain trail event held in Culoz-Béon, located in the Bugey region of eastern France. The shortest option covers 9.6 km with 311 meters of elevation gain, meaning even the introductory race requires runners to navigate hills, not just a flat course. The event spans from this 10 km run to a 120 km ultra covering approximately 5,000 meters of ascent, with relay options offered for the longest distances. The major courses traverse ridges, pass through forests, and go by waterfalls and lakes. The 45 km Maratrail ascends to the summit of Grand Colombier, attracting both experienced trail runners and dedicated amateurs.