TRI COUNTY FAIR Labor Day Weekend in Mendota 2025 Tri-County Fair! Carnival All Weekend Long Thursday, Aug. 28 Dirt Drags Friday, Aug. 29 ISP Truck and Tractor Pulls Saturday, Aug. 30 Mega X Shoot Out Motorcycle Racing Funky Munky Wrestling Sunday, Aug. 31 Vintage Stock Car Races Monday, Sept. 1 Demolition Derby TRI COUNTY FAIR Labor Day Weekend in Mendota 2025 Tri - County Fair ! Carnival All Weekend Long Thursday , Aug. 28 Dirt Drags Friday , Aug. 29 ISP Truck and Tractor Pulls Saturday , Aug. 30 Mega X Shoot Out Motorcycle Racing Funky Munky Wrestling Sunday , Aug. 31 Vintage Stock Car Races Monday , Sept. 1 Demolition Derby