Check out this series in Missouri (first race is March 8th at the Lake of the Ozarks). We will be chomping at the bit to ride by then...

http://www.midwestfattireseries.com/

Details from the website:

Welcome to the Midwest Fat Tire Championship Series

The Midwest Fat Tire Championship Series is in its seventeenth year of promoting mountain bike racing across Missouri. We sanction some of the largest area mountain bike races and are one of the longest running organized series in the country. Our races are some of the best courses in the region where racers enjoy technical, challenging course layouts, while respecting the land and promoting fair use. There are racing categories for all levels from beginners to experts to marathoners. These races offer some of the best competition and camaraderie in the region - join us for the 2009 season!

2009 MWFTCS Schedule

March 8 - Oz Epic, Lake of the Ozarks State Park, Kaiser, MO
March 14 - Bone Bender 3/6 Hour, Smithville, MO
March 22 - Lost Valley, St. Charles, MO
March 29 - Rim Wrecker, Council Bluff Lake Recreation Area, Potosi, MO
April 19 - Le Tour de Tick, Neosho, MO
May 2 - Castlewood Challenge, Castlewood State Park, St. Louis, MO
May 30 - Dirty Kanza 200, Emporia, KS
June 7 - Rhett's Run, Cosmo Park, Columbia, MO
June 21 - St. Joes State Park, Farmington, MO
July 12 - OMBA Caramba, Sac River Trails, Springfield, MO
July 26 - Show-Me State Games, Rock Bridge State Park, Columbia, MO
August 9 - Spanish Lake, Spanish Lake, MO
August 15 - Rapture in Misery 6/12 Hour, Crowder State Park, Trenton, MO
August 23 - Cape Race, Cape Girardeau, MO
September 5 - Binder Lake 6-Hour, Jefferson City, MO
September 12 - Castlewood ICCC, Castlewood State Park, St. Louis, MO
September 19/20 - Kansas City Cup, Swope Park, Kansas City, MO
September 27 - Greensfelder, Eureka, MO
October 4 - Truman Lake Mountain Bike Park Race, Warsaw, MO
October 24/25 - Berryman Epic Tour/Race, Steelville, MO