The Indiana State Fairgrounds is a big venue, and the 2006 installment of the 4-Wheel Jamboree needed every inch of it. Celebrating their 25th anniversary with another successful show, 4-Wheel Jamboree delivered a weekend packed full of events. With just enough rain on Friday to ensure plenty of mud for the monster trucks and stadium trucks, the weather cooperated for most of the weekend. Spectators had plenty of opportunities to check out the events in the stadium, as well as the entertainment from the stage at the amphitheater, which included the ever-popular bikini contest. For fans of brute power, monster trucks and mud drags provided a horsepower showcase, with huge engines rumbling the entire fairgrounds and stadium trucks racing through a winding course with hairpin turns and punishing jumps.