Eyes widen, jaws drop when yachts as large as 52 feet fly across the Bay competing September 13-16 in the Rolex Big Boat race at the St. Francis Yacht Club. Very determined global competitors are showing up for this one. The best times to watch are from 11-4 on the three days. If it’s half as exciting as the Americans Cup race that was held here in 2013 when New Zealand was beaten by Oracle Team USA, it should be fairly breathtaking. Free.