The Trail Briard by Night invites runners to take part on Saturday, November 14, 2026, in La Trétoire, in Seine-et-Marne. Organized by the JSFG athletics section, the event features an individual race of around 14 km, with 320 meters of elevation gain, along the trails of the Petit Morin Valley.
The start and bib pickup will take place at the La Trétoire community hall. The course follows hiking trails, with cutoff times to regulate participants’ progress. The event is open to categories from cadets to masters, subject to the conditions set out in the rules.
To run these trails at night, each runner must have a headlamp and spare batteries or a spare battery. The rules also require a reflective armband, an emergency blanket and a mobile phone with the race organizers’ number saved. The race website also asks participants to bring their own cup. Refreshments will be available for participants at the finish.
Race entries are available through the official Trail Briard by Night ticket office. The rules set the initial entry fee at €15 through November 8, 2026, inclusive, then increase it to €17, excluding transaction fees. Online registration closes at midnight on November 13, subject to availability. No on-site registration is planned.
To compare the season’s events, check out our guide to running races in Paris and Île-de-France.
This page may contain AI-assisted elements, more information here.
Dates and Opening Time
On November 14, 2026
Prices
Trail — inscriptions jusqu’au 8 novembre 2026 inclus, hors frais de transaction: €15
Trail — palier suivant, jusqu’au 13 novembre 2026 inclus, hors frais de transaction: €17
Official website
www.ultratrailbriedesmorin.fr
Booking
in.inscription-sport-up.com
