Originally Posted by rjmaiorano
If you've never done an aerobic endurance sport this will be a very large challenge to prep for, let alone finding teammates that are dedicated to it also. Do you have experience in any competitive sport?
Anyway, building a base of running and biking is a good start. Squash will provide a good cross training and help with footwork sure, but you'll only get better navigating trails by running them. Your speed...