According to Official Guinness Records,
The largest parade of off-road motorcycles consisted of 3,312 motorcycles and was achieved at the Bananalama event held in Corupá, Santa Catarina, Brazil, on 7 July 2013.
The distance covered was 2.74 miles (4.41 km). Overall, 4,281 motorcycles and ATVs registered for the event, but ATVs were discounted and had a separate 30 min head start.
For a complete list of 2013 records, please visit 2013 Guinness Records in Brazil.