Sometimes it really does take three tries as evidenced by us. In 2008 Shelley and I were not able to find the second mystery checkpoint, in 2009 we came in 2nd and this year we managed to win. WIN. I like the way that sounds… :)
The Urban Assault Ride is a combination bicycle race and treasure hunt and obstacle course. You ride (read: race) your bike from checkpoint to checkpoint and at each one you need to perform some sort of physical or mental challenge. Upon completion of said challenge you get a token and can then proceed to the next checkpoint. One twist is that the organizers only announce five of the seven checkpoints in advance and just give you a clue to the sixth one. Assuming you figure this out and get to the sixth checkpoint, that's where you get your only clue to help you discover where the seventh one is. I know, I know… stress! Local knowledge is obviously a huge plus.