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Château de la Madeleine, Chevreuse, Île-de-France, France
Trail des Lavoirs is a single-day trail running event held in the Chevreuse valley (Parc naturel régional de la Haute Vallée de la Chevreuse) that brings runners close to the historic parks around Versailles. The event is presented by the Association Route des 4 Châteaux and is promoted as an eco-responsible sporting experience; the organiser cites a start/finish at the Château de la Madeleine in Chevreuse for recent editions. The official site highlights three distinct parcours — Long, Court and Découverte — designed to showcase the local landscapes and heritage.
Practical information on the site points entrants to GPX course files and an "Infos Pratiques" section for maps and logistics, and past editions and results are published on linked results pages. The route descriptions emphasise varied terrain (coteaux, marais, fermes and picturesque hamlets) and easy public-transport access via RER for participants visiting from the Paris region. Entrants are directed to the organiser's registration portal and the event homepage for the latest timing, route and entry details.