La Gravel Tro Breizh
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La Gravel Tro Breizh

Lac de Trémelin, Brittany, France, France May 1, 2027
Difficulty Profile
TERRAIN
CLIMBING
HEAT
1300 km Distance
19000 m Elevation
Gravel Surface
Extreme Difficulty

What to Expect on La Gravel Tro Breizh

Keep in mind that the Gravel Tro Breizh is an unassisted, all-terrain ultra-distance event – ​​you can choose between a gravel bike, a monstercross bike, or a mountain bike, depending on your physical and technical abilities. If you opt for a gravel bike, be careful, the small tire section may handicap you in the fun sections. We can’t stress it enough: the Gravel Tro Breizh isn’t only run on roads and easy trails!

The Gravel Tro Breizh is a race with a mileage of around 1300 km. The distance must be covered in the relatively short time of 180 hours, or 7 days and 12 hours (you must complete at least 165 km per day to finish on time).
Even though the Gravel Tro Breizh is not a race, this event cannot be improvised. You must be in good physical condition to complete the course, and plan long days on the bike to finish on time.

The route is designed to be as balanced as possible – alternating between easy and slightly more “difficult” areas. This is also linked to the geography of Brittany – there is necessarily more elevation in the interior and central Brittany than in southern Morbihan, for example.
The route is adapted according to these parameters to provide you with the best experience for your adventure. The ratio of tracks, easy paths and small roads is higher than the “fun” and hilly sections.

The route changes every year to discover the very rich variety of Brittany.

Bike Setup for La Gravel Tro Breizh

Bike Gravel Bike
Tires 45-50mm Tubeless
Cassette 10-51T
Chainring 38-40T (1x)

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Frequently Asked Questions

How long is La Gravel Tro Breizh?

At 1300 km with 19000 m of elevation gain, La Gravel Tro Breizh is roughly the distance of 31 marathons back to back, with climbing that adds up to more than 2.1 times the height of Mount Everest.

What bike do I need?

A Gravel Bike is the right tool for La Gravel Tro Breizh. Set it up with 45-50mm Tubeless rubber and gear it low — a 38-40T (1x) chainring and 10-51T cassette will keep you spinning on the steeper sections.

How difficult is it?

La Gravel Tro Breizh carries an overall difficulty rating of Extreme. The terrain itself is rough, technical terrain for a good stretch of the route, the climbing is consistently demanding, with sustained climbing, and conditions tend to run mild and generally comfortable.

When does it take place?

Mark your calendar for May 1, 2027 — La Gravel Tro Breizh's spring timing means when weather can still be unpredictable, so a flexible kit is worth packing.

What surface is it?

La Gravel Tro Breizh runs primarily on gravel, and we'd recommend 45-50mm Tubeless tires to handle it comfortably.