Big Rig Round Up July 28 The annual Big Rig Round Up rolls into Wentz Run Park next Friday, July 28 beginning at 5 p.m. This is the rain date from last week. The family-oriented night offers the young and the young at heart an up close look at the unique trucks and equipment used by local fire companies, police departments and public works crews. Children, for example, can sit in a construction vehicle and pretend they are the site foreman. The Round Up runs from 5 p.m. to 7:30 p.m. Kona Ice and the Whitpain Tavern Food Truck will have concessions for sale.