Most participants in a swimming relay in one hour (60 ft pool)

According to Official Guinness Records,

The most participants in a swimming relay in one hour is 281, achieved by the Foundation for Aquatic Safety and Training (FAST) and its founder, Joseph Zemaitis (USA), in Phoenix, Arizona, USA, on 25 August 2012.

For a complete list of 2012 records, please visit 2012 Guinness Records in United States.

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