The Bike and Run de Marsillargues is a team race held in Marsillargues, located in the Hérault department of southern France, typically taking place in November. Pairs share a single mountain bike, alternating between running and riding, and switching roles throughout the course. Available distances include a 15 km 'S' race, a 7.5 km 'XS' race, and a 2.3 km children's race.
The race format is designed for pairs, emphasizing tactics such as timing the rider-runner transitions and maintaining a consistent pace between teammates. La Grande Motte Triathlon is the organizing body, offering categories for younger children, older juniors, and adults. The event is part of the Hérault Departmental Bike & Run Challenge, concluding with an awards ceremony after the timekeeper and referees verify the official results.