Join the Run Mate by Core-Lean Lac Léman adventure

Join the Run Mate by Core-Lean Lac Léman adventure is an organised two-day, one-night team relay around Lake Geneva (Lac Léman) with the start and finish in Montreux. The event presents approximately 215 km split into 24 relay legs, combining road and trail sections and designed for teams of 2 to 9 runners. The format emphasises camaraderie and accessibility, offering separate ULTRA and TEAM competition categories for different team sizes and encouraging both novice and experienced runners to take part.

The course follows the shores of Lake Geneva and passes through Swiss and adjacent French lakeside towns, with GPX and KML route files published by the organiser (final files released shortly before the race). The event page notes logistical support for teams travelling between legs by one van or cars and highlights a festive atmosphere with supporters and post-race meals. The 2026 edition is listed as the 8th edition and is sold out with a waiting list available on the official site.