According to Official Guinness Records,
The largest pitchfork measures 18.65 m (61 ft 1 in) long and 2.56 m (8 ft 5 in) wide and was created by Jim Bolin (USA) and verified in Casey, Illinois, USA, on 20 October 2015. The pitchfork is on display in front of the local restaurant Richards Farm and weighs approximately 1,940 lbs.
For a complete list of 2015 records, please visit 2015 Guinness Records in United States.