Ultrabaie

When the Baie de Somme becomes your playground. L'Ultrabaie is a trail that takes you from sand to cliffs, between harbours, dunes and seaside villages. No mountains or major elevation here, but kilometres carved through a unique setting: the Picardy coastline and its endless horizons.

What you'll find on site:

• A harbour atmosphere in Saint-Valery-sur-Somme, transformed into a lively race village throughout the weekend;
• The pleasure of running through sand, pebbles, grass and coastal paths, with the Channel on the horizon;
• Crossings of iconic sites: Le Crotoy, Cayeux, Ault, Mers-les-Bains… names that smell of the open sea;
• A simple and welcoming organisation, true to the spirit of seaside trail running.

Course focus:

L'Ultrabaie comes in several formats, over several days.

On Wednesday, it's the UB800: 240 km in 5 days, as a team.

On Friday, the UBBaie launches (authorisation in progress – registrations planned for 2026).

On Saturday, short formats for everyone: 3 km, 5 km and 14 km between Le Crotoy and Saint-Valery.

On Sunday, the distances get longer: 19 km, 34 km and the UB70 all the way to Mers-les-Bains… while the UB800 wraps up its adventure.

A rolling profile, but never easy: sand, pebbles and wind are quick reminders that the bay has to be earned.

3 (good) reasons to take part:

1. Discover the Baie de Somme in a different way, at the pace of your stride;
2. Mix things up: from fast racing to a long escape over 70 km;
3. Experience a trail that combines authenticity, nature and conviviality.

Results:

• 2026