Mesa is having an event this coming weekend in Fellsmere. Sat and Sun 9am-? The entry is fifteen to ride all day or five bucks for spectator. Must have a helmet to ride and flag for quads. They are having a Holloween event for the litlins including hayrides and goodie bags. These guys have made an insane mx/atv track and atv riding areas including mud and drag lanes. Come on out and show your support for bulldog mudbog at Mesa Park this weekend the 29th and 30th this is going to be an awesome ride.
They are located on CR 512 just west of I-95 at the Fellsmere exit. 
