Guillaume Berthier currently has a ranking of Expert Level B+ (week 46/2026), which is position TOP 1K among men in France. Guillaume has run 7 scored trail races. The best scoring result achieved is several hundred RMT points on a course of ⨦ 150.5 km and + 8 950 m vertical during UTMB in 2021. They recently participated in EcoTrail Paris 2026 and scored a lot of RMT points.