La Gravel Tro Breizh
8–15 May 2027 · Lac de Trémelin, Iffendic, Brittany, France
About La Gravel Tro Breizh
La Gravel Tro Breizh is a fully self-supported, ultra-distance gravel and bikepacking adventure around Brittany in northwestern France. Organised by Erminig, the event takes riders on an extensive journey through one of France’s most distinctive cycling regions.
The 2027 edition takes place from 8–15 May, starting and finishing at Lac de Trémelin near Iffendic. Celebrating its tenth edition, the event offers approximately 1,350 km of riding with around 19,000 m of climbing.
The route explores Brittany’s rugged coastline, forests, historic towns and rural landscapes, combining gravel tracks, trails, quiet roads and more technical off-road sections. The course changes annually, offering a different experience with each edition.
La Gravel Tro Breizh is a non-competitive endurance challenge. Riders must manage their own navigation, mechanical repairs, food, accommodation and rest throughout the journey.
Participants can enter individually or as a duo, with a maximum permitted time of 180 hours — seven days and twelve hours — to complete the course.
The event is designed for experienced endurance riders who are comfortable travelling long distances across varied terrain with limited external support.
Routes & Races
La Gravel Tro Breizh — 1,350 km
Distance: Approx 1,350 km · Elevation: Approx 19,000 m · Route Format: Loop · Terrain: Gravel tracks, forest trails, minor roads and technical off-road sections · Time Limit: 180 hours
The Gravel Tro Breizh route is an extensive circuit of Brittany, taking riders through the region’s varied coastal and inland landscapes.
The course combines long-distance endurance with demanding off-road riding. Participants can expect forest tracks, gravel paths, rural lanes and occasional more technical terrain, together with substantial cumulative climbing.
Unlike events using a fixed annual course, La Gravel Tro Breizh introduces a revised route each year. Riders therefore need to prepare for changing terrain and navigation demands.
The organiser plans to release the final 2027 GPX files on 1–2 May 2027.
This is a fully self-supported challenge, with riders responsible for their own food, accommodation, repairs and route management.
Age Groups/Eligibility
La Gravel Tro Breizh offers Solo and Duo participation formats.
The organiser describes the event as non-competitive, and no separate elite or age-group racing classifications have been established from the available 2027 information.
Participants should review the official regulations for entry eligibility, mandatory equipment, insurance and self-supported riding requirements.
