Well just finished my first 24hr Mtb race. I was in a 4 man team (which I didn't realise was where the serious teams race). We all rode exactly 100kms each over the 24 hrs, putting us in 10th place and 27th overall. Worst part of the race was sprinting 2 laps at 3am in the morning only to come into the transition and not have a team mate as he had over sleep, so out I went for another 10kms.
Here a couple of pics showing the awesome fun the track was, by the second day it had bigger braking bumps and ruts than most Downhill tracks.
I like this shot, you can see the sweat on my nose.