La Saint So Course - 42 km 2026

The La Saint So Course, 42 km, begins at 08:00 in St Sorlin En Bugey, located in the Ain department of the Rhône-Alpes region. This is a trail marathon-distance race, also known as Le Maratrail du Bugey, featuring 42 km of off-road running instead of a flat road-marathon course. The most telling statistic about the course is the 2,250 meters of elevation gain. This classifies it as a demanding Bugey trail event: it is long enough to resemble a marathon, but the significant vertical gain requires runners to have mountain-honed legs, disciplined pacing, and experience on challenging terrain.