Coming August 31, 2013. There shouldn’t be any sharks, so join Enviro-Sports’ 3rd annual Golden Gate Sharkfest Swim. The 1.6 mile open-water swim in water temperatures of ~60-62° F is not for the novice! You’ll start at the South Tower of the Golden Gate Bridge and using the bridge as your guide, swim toward the North Tower of the bridge and Horseshoe Cove. A challenging open-water swim and in a spectacular setting.