This site tells all about the 1996 bikerayce held in Neosho MO from May 22 to May 26. This page hasn't been updated for awhile, but look for information on future events eventually.
Results are available.
Chequamegon Fat Tire Festival 1999 will mark the 17th annual event, which is always full by the time you get around to thinking about participating. Next year for sure. It's held in September. Cycle Messenger World Championships Hosted by the District of Columbia Bicycle Messengers Association, September 4-7. Austria, May 30-June 1.