My offical time was 4:36. Looking at the expert times that would have put me in 22nd out of 28 (if I had been in the class). Not so good. How did I fare against the beginners? Well, 4:36 would have been a winning time of the 21 other racers. Just re-inforcing the fact that I placed myself in the right category.
I expect that a little local knowledge helped my on the trails too.