Ronde Ermont is a road race held in Ermont, located in Val-d'Oise, northwest of Paris. Participants can select either a 5 km or 10 km distance. The 5 km race begins first, followed by the 10 km later in the morning. Both distances are classified as regional-level road races, and the event is organized by the Ville d'Ermont via its Sports Department.
The races feature 5 km and 10 km city courses, presenting a direct local road event rather than a trail or long-distance competition. The Club athlétic ermontois collaborates on the organization, with volunteers from Ermont associations assisting on race day. Participants receive a race T-shirt at the start, and the venue provides refreshments and changing facilities.