Marathon swimming
Marathon swimming is a class of open water swimming defined by long distances, with 10 kilometers (6.21 miles) being the unofficially held minimum distance. Routes are typically geographically based or buoy based.
Marathon swimming is a class of open water swimming defined by long distances, with 10 kilometers (6.21 miles) being the unofficially held minimum distance. Routes are typically geographically based or buoy based.
Marathon swimming is a class of open water swimming defined by long distances, with 10 kilometers (6.21 miles) being the unofficially held minimum distance. Routes are typically geographically based or buoy based.
Source: Wikipedia "Marathon swimming" · CC BY-SA 4.0
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