L'Ain en courant du Grand Fond Bressan is a 375 km flat race based in Bourg-en-Bresse, in France's Auvergne-Rhône-Alpes region. It is designed for long-distance runners who prioritize covering a large distance over speed, with the listed entry fee for the 375 km option at 1100 €.
The course information is limited, but its scope indicates an ultra-distance challenge in the Ain area, distinct from a standard city road race. Participants in Bourg-en-Bresse may also visit the apothicairerie of the Hôtel-Dieu, a historic pharmacy museum recommended as a worthwhile local attraction near the race.