The Round Rock Parks and Recreation Department presents the Round Rock the Boat Regatta at Old Settlers Park, where contestants build their own boats from cardboard, on Saturday, May 15. The event starts at 10 a.m. and the races begin a 12 p.m. 

Come out and watch or race in the regatta and see if your boat will sink or float. Register online.

Rain out day: May 16 with same time schedule.