EcoTrail Paris 2026 Guide: the 80 km from Versailles to the Eiffel Tower

The EcoTrail Paris course is unique. Unlike the great alpine races, the elevation is modest, but the terrain blends forest trails, peri-urban passages and an iconic finish on the Champ-de-Mars below the Eiffel Tower. The Versailles forest, the Chevreuse and Bièvre valleys, and the Meudon and Boulogne woods thread through remarkably varied landscapes less than an hour from central Paris.

That terrain changes the preparation logic compared to mountain races. For a relatively flat 80 km, the main challenge is pacing over a long duration, managing fatigue from hard trail and road surfaces, and fueling well enough to hold effort all the way into Paris. Runners who go out too fast through the Versailles forests often struggle seriously in the Bièvre valley.

The best preparation combines long mixed-terrain outings, trail-shoe sessions on hard surface and fueling tests across five to seven hours of effort. Because race rules require both a personal reusable cup and real hydration capacity, it makes sense to integrate your flasks, cup and aid-station rhythm early in training. The eco-responsible format also bans plastic waste outside designated aid station zones, and the organiser takes that seriously.

Logistics are unusually simple for Parisian and regional runners. The Versailles start is accessible by RER C from Paris (direct service to Versailles Rive Gauche). Runners arriving from further afield can use TGV services into Paris Montparnasse, Paris Nord or Paris Est, all of which connect well to the RER C. The finish at the Champ-de-Mars is served by Paris Metro lines 6 and 8 from Bir-Hakeim station, and by RER C at Champ de Mars Tour Eiffel.

For bib pickup, village details and exact start logistics at Versailles, check the official site ecotrailparis.com. The operation is well-established across multiple distances (18 km, 30 km, 45 km, 80 km) sharing a single bib system. The most practical accommodation for arrivals is either central Paris or Versailles depending on your programme around the race. The TrailCompanion Prep is useful for planning transport, bib pickup timing, fueling strategy and recovery after finishing under the Eiffel Tower.

For runners arriving from outside the region, the big rail hubs are Paris Montparnasse, Paris Nord and Paris Est, then the regional network does the rest. Getting to the 80 km start is mostly an RER / Transilien question, while the Paris finish makes the return unusually easy without a car.

The real logistics trap is timing rather than distance. A night start means your outward journey, start-corral margin and post-finish exit all need to be solved cleanly before race day.

If you are travelling in, staying in central Paris usually simplifies post-race recovery. A base in the 15th or 16th arrondissement, or near an RER C connection, works well for both the start logistics and the finish.

Versailles or the south-west Paris area can also be smart if your main priority is simplifying the trip to the start. The best choice depends more on your post-race return plan than on absolute start-line proximity.

EcoTrail Paris is the perfect entry point to the 80 km ultra-trail world for runners from the Paris region and across France. If preparation combines good long-distance pacing management with simple logistics, you reach the Eiffel Tower having run a well-managed race and a real ultra-distance experience.