Trail de la vallée de la Sarre - Guern 2026

Trail de la Vallee de la Sarre is a trail-running event held in Guern, a village in Morbihan, Brittany, north-west France. It takes place in October, offering runners several off-road distances ranging from a short 8-9 km to a 50 km race. Intermediate distances are typically around 14-15 km, 23-25 km, and 35 km, catering to those seeking a manageable local trail or a longer challenge. The courses traverse the Sarre valley near Guern, with elevation gain varying by route. Recent race data indicates the 15 km has approximately 450 m of ascent, the 25 km around 850 m, the 35 km about 1000 m, and the 9 km roughly 250 m. The longer events begin early, with the 50 km starting first, followed by the 35 km, 23 km, 14 km, and 8 km races throughout the morning. Entry fees for the shorter and mid-distance races are modest, contributing to the event's atmosphere as a local Breton trail gathering rather than a large commercial competition.