Tonight is the grand finale for the Inter-State Fair and Rodeo.

The much-anticipated demo derby takes center stage at the grandstand. Organizer John Reeves with Oklahoma Boys Promotions says he's adding a new class this year.

Reeves says he's received feedback and made the demo area a bit bigger this year. Gates open at 6 and the demo action starts tonight at 7 p.m. at the fairgrounds in Coffeyville.