You know, if I can maintain my reasonably comfortable 100k pace, I could ride the first 200k of a 400k, go to sleep, and then finish the 400. Probably would make more sense to do 300k and then 100k the next day though.

"Overall time limits vary for each brevet according to the distance. These are: (in hours and minutes, HH:MM) 13:30 for 200 KM, 20:00 for 300 KM, 27:00 for 400 KM, 40:00 for 600 KM, and 75:00 for 1000 KM."

I guess we will see how Saturday's 200k treats me.