NIMBA, which is Northern Indiana Mountain Bike Association, host a Race series that is worth the effort to check out. http://nimba-bike.org/race-info/ All the courses are well maintained. and easy to get to from places like , Chicago, Indianapolis, Peoria, Grand Rapids & Fort Wayne! The Next Race Venue is Potato Creek on June 1st. PC is a blast to ride, has a nice flow and there is even a Beach to go for a swim afterwards. Camping is available.