well i know nothing about them, so can you enter them as a team and take turns or are they for full on mad people who can ride for 24 hours
if you can enter as a team (how many is a tem, 2, 3, 4?) then which are the best ones? I quite fancy trying something like this next year.
When do the entries usually open?
I've heard of the mountain mayhem one but not sure what others there are