I think this is it...

Ronald Reagan Park
770-822-8840 - 2777 Five Forks Trickum Road, Lawrenceville, GA
Amenities: A two-acre fenced-in area where dogs can play off their leashes. 25-acre park has a "senior" area with horseshoe pits, shuffleboard courts, bocce ball courts and a covered picnic pavilion with permanent chess and checkerboards. Other amenities include a small skate area, a playground, two half-court basketball courts, several covered picnic areas, a 3/4-mile paved multi-purpose trail and a small pond.