AEST 11:34, Mon Jul 28 2014
Competitors have braved muddy water and slime for the 10th Northern Ireland Bog Snorkelling Championship.
The event took place at Peatlands Country Park and attracted competitors from all over Ireland.
Competitors had to swim two lengths of a 60-yard bog drain with the aid of a snorkel, mask and flippers and without using any conventional swimming strokes.
"The atmosphere was fantastic. It was just mental," organiser Colin Gates told the Independent.
Anyone over the age of 12 can enter.
Photos: Getty Images
A competitor at the start line.