Certificate or Ticket I would guess then, Patent just doesn't seem to applySorry. Link.
It's a series of long rides. Ultramarathon level but not races (well, not officially). Unsupported except cyclists are allowed to help each other. 200K. 300K. 400K. 600K.
Most brevet riders ride at least 200 miles a week to train, and ride a lot of centuries.
There are many wrinkles.
Happy shaves,
Jim