"Events" or "Races"?
To my mind an Event is a non-competitive way of getting people out riding in a group, these seem to be on the increase...
Races are also still pretty popular, there is perhaps a general shift among the large majority of MTBers away from straight XC races towards Endurance, DH and "Combined discipline" type competitions...
The biggest challenge I think faced by Event/Race organisers is costs, high costs = High entry fees = insuficient entries...
I do think there's room for something like the good old club TT model, it's not a race merely a bunch of riders setting off at intervals from one point taking a pre-determined route to another point and their start/finish times being logged, but it's NOT a race, no prizes, no points to win, no podiums, merely a training excercise for those looking to guage their performance...
Works on the road can't see why it wouldn't for MTBs, should be cheaper and easier to operate, and could help encourage people start racing too...

