Ultra Trail du Grand Colombier - 45 km 2026

The Ultra Trail Grand Colombier 120 km is a long mountain ultra held in Belley, within France’s Bugey region. The route covers just over 120 km with approximately 5,000 meters of elevation gain, placing it in the category of all-day and all-night trail running, distinct from a standard mountain race. It is also designated as a UTMB Index 100M race, signaling to participants that it counts towards the longer ultra category, despite its distance being closer to 121 km than a full 100 miles. The course leads runners across ridges, up steep trails, through dense forests, and past green valleys, waterfalls, and lakes surrounding Grand Colombier and the Bugey countryside. It is intended for experienced trail runners, though the format allows for team participation: the 120 km can be divided among a five-person relay team. Results indicate a field numbering in the hundreds rather than a massive event, with 373 finishers recorded for the 120 km race, suggesting a serious regional ultra with sufficient depth to attract dedicated mountain runners.