In addition to CORBA, there are neighboring clubs with great mountain biking single track in the central Illinois area. You can find information and links to the clubs below.

Chicago Area Mountain Bikers – CAMBR
Friends of Off Road Cycling, Quad Cities USA – QCFORC
Kickapoo Mountain Bike Club – KMBC
Macomb Area Cycling Moutain Bike Club – MACMTB
Peoria Mountain Biking Association – PAMBA

The International Mountain Bicycling Association (IMBA) is a 501 (c) 3 non-profit educational association whose mission is to create, enhance and preserve great mountain biking experiences.
International Mountain Bicycling Association – IMBA