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Bog snorkelling is a sporting event that consists of competitors completing two consecutive lengths of a 60-yard (55 m) water filled trench cut through a peat bog, in the shortest time possible. Competitors must wear snorkels and flippers, and complete the course without using conventional swimming strokes, relying on flipper power alone. Wet suits are not compulsory, but are usually worn.

The World Bog Snorkelling Championship, first held in 1985, takes place annually every August Bank Holiday at the dense Waen Rhydd peat bog, near Llanwrtyd Wells in mid Wales. It now attracts more than 200 entrants each year and is currently sponsored by Rowntrees Randoms. Andrew Holmes is the world record holder with the time 84 seconds. 

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