Riders on a track in the Landes forest

Flatlandes GRVL · 28 March 2027 · Tosse

100+ and 200+ km of gravel in the Landes forest.

On the last weekend of March, a self-supported gravel challenge through the Landes forest in south-west France. Registration opens on 1 November 2026. Limited places.

Register Shop

Flatlandes is a ride, not a race: ride fast, but above all ride right. Self-reliance, commitment, respect for others and for the forest.

Two formats · Sunday 28 March 2027

Pick your distance.

Mass start at 8:00 am from the Salle de Maremne in Tosse. The first 9 km are ridden together, then the routes split. 300 places per distance.

  • 100+ KM

    The fast one.

    One feed station at km 55. Cut-off at km 55 after 3h30 (about 16 km/h), finish around 6h45.

    Register for the 100+
  • 200+ KM

    The long way through the forest.

    Feed stations at km 93 and km 150, water point at km 135. Between km 93 and km 150 the area is remote: little water, few roads, patchy signal. Cut-offs based on 20 km/h.

    Register for the 200+

2027 registration

Opens on 1 November 2026.

Limited places: 300 riders per distance. Online registration only. Flatlandes Ultra: coming soon.

See registration

Self-supported

A GPX track, no waymarking.

Navigation is by GPX track only, sent before the start. Every rider manages their own navigation, water and food, on roads open to traffic.

The course stays fast whatever the weather: less than 500 m of sand in total. Recommended tyres: 40 to 45 mm.

Two riders on a pale sandy track between the pines

Included

In your registration.

  • The GPX track

    The official track, sent before the event.

  • Feed stations

    Access to the feed stations on the course.

  • Timing

    A timing chip, time recorded at the finish.

  • The finish

    A sandwich, a coffee and a drink, showers and toilets.

  • The tote bag

    Goodies from our partners.

  • The photos

    Free access to the photos of the day (private use).

Shop

Wear the Flatlandes.

T-shirts, jerseys, caps and stickers: the official collection is coming soon to the shop.

Visit the shop

Two riders among flowering gorse

Practical info

Frequently asked questions.

Where and when is the start?

Sunday 28 March 2027 at 8:00 am, Salle de Maremne, Allée des Sports in Tosse (Landes). Mass start for both formats, with 2 neutralised kilometres.

When do I collect my race pack?

The day before, Saturday 27 March, from 6 pm to 8 pm at the Salle de Maremne. Strongly recommended.

Is the course waymarked?

No. Navigation is by GPX track only, sent before the start. Check your GPS and that the track is loaded before the event.

Are there cut-off times?

Yes, with 30 minutes' tolerance. 100+: km 55 at 3h30, finish around 6h45. 200+: km 93 at 4h39, km 150 at 7h30, finish around 10h27. Outside the cut-off you are out of the event and ride back by a safe route.

What if I drop out?

There is no support on the course: every rider must be able to get back alone. Cycle routes back to Tosse will be shared before the event.

Where can I park?

Parking around the hall is limited: use the car parks in the village. The Leclerc car park is off-limits. A list of recommended car parks will be published the week before the event.

Coming soon · Sept. 2027

Flatlandes Ultra.

Longer, further, still in the heart of the Landes forest. That's all we can say for now.

Find out more
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