Two boat clubs and ample public launching facilities keep White Rock lake full of sails in fair weather, and the weather is fair enough for sailing for at least a few days in all but the hottest months of the year. Both clubs host regattas, races and training exercises, so on a good weekend day you're likely to see white sails and colorful spinnakers (the big sails that look like hot air balloons) up and down the lake. The best thing is that all of these boats are contained within about one and a half square miles of water, all of it surrounded by park and picnic area, so the sails are never too far away to watch. It makes a romantic background for an outing, and, who knows? One of them might even tip over.