Welcome to the Fourth Annual San Francisco Bridge to Bridge 10K Swim. This is a 10K swim, approximately 6.2 miles. The event will take place on September 29, 2012 and will begin at the Golden Gate Bridge and finish at the San Francisco Bay Bridge during a 3.0 knot flood. The water temperature for the swim is expected to be 58 to 61 degrees F. Only swimmers with extensive open water swimming  experience should register.