609 in 2015 and later

648 past in 2015 (updated 17-07-'15)

The World’s Most Difficult Swims

Since Captain Matthew Webb became the first person to swim the English Channel in 1875, marathon swimming has fascinated the public. Swimmers are constantly trying to break records and boundaries, and to find swims that have never been completed before. A marathon swim is classed as any open water swim over 10km, in which traditional channel swimming rules apply.

Notably, no wetsuits can be worn, just a normal swimsuit, goggles and a thin swim cap. Enduring the cold is considered part of marathon swimming, just as surviving the heat is part of events such as the Hawaiian Ironman.

Read the article @explorersweb