Le Marathon Vert Rennes

Le Marathon Vert Rennes Groupe Interaction is a major urban marathon weekend held in Rennes, France, the capital of Brittany. The event combines a fast city marathon with a strong environmental identity, making it one of France’s most distinctive destination road races. The marathon is run on a 100% urban course through Rennes, starting on the Mail François Mitterrand and finishing on the Esplanade Charles de Gaulle. The course is described by the organizer as very rolling, with about +110 m of cumulative elevation, and is promoted as suitable both for first-time marathoners and runners chasing personal bests.

The event’s green concept is central to its identity: across the race weekend, one tree is planted for every 2 km covered by participants. For marathon finishers, that works out to 21 trees planted per runner. The race weekend includes the marathon, marathon relay, marathon duo, 10K, women’s 5K, and family walk, creating a broad running festival rather than a single-distance event.

Rennes itself gives the race a strong destination appeal. The city is known for its historic Breton character, lively centre, half-timbered houses, cultural venues, and student energy. For runners, the event offers the convenience of a city marathon with strong public transport access, a central finish area, and a festive race village atmosphere.