The world’s top athletes from around the globe take over the streets and waters of San Francisco annually for this prestigious triathlon. The event draws some 2,000 triathletes and relay teams every year. Showcasing the beauty of San Francisco, triathletes embark on a 1.5 mile swim from Alcatraz Island to the San Francisco shoreline, an 18 mile hilly bike ride out to Golden Gate Park and an eight-mile trail run out to Baker Beach and up the infamous Sand Ladder. This world renowned triathlon sells out within hours of the registration opening each year. Watch the triathlon trailer here. Find out how you can register here.