Warren County Farmers Fair. The 68th Annual fair. This year's fair runs Monday-Sunday, Aug. 1-7 (adding an extra day) and tickets for the special events (demolition derby, mud bogs, truck and tractor pulls) are on sale now through July 29. Hurry, they are going quick. You can pick them up at the Rutgers Cooperative Research & Extension office in the county's Wayne Dumont Jr. Administration Building, 165 County Route 519 South, Belvidere (White Twp.) Call 908-859-6563 or visit www.warrencountyfarmersfair.org.