Competitors will plunge into a water-filled trench cut from a peat bog, vying to swim two lengths in the shortest possible time, as part of the third annual Bog Snorkelling Championships at Peatlands Park tomorrow.

The challenge, held to mark International Bog Day, is open to adults and children. Competitors must swim two consecutive lengths of the trench without using conventional swimming strokes and wearing snorkels and flippers.

The event is aimed at celebrating the beauty of our bogs and making people more aware of peatlands and the threats they face.

Louise McAlavey of EHS's Biodiversity Unit said: "Our bog lands are an important and protected habitat that need special attention to ensure their survival for future generations. Tomorrow is sure to be a lot of fun and a great way to highlight the importance of bogs.

"Northern Ireland is lucky to have such varied biodiversity for everyone to enjoy - that includes bogs, freshwater loughs, mountains, woodland, grassland and a varied coastline."

Peatlands Park warden Ciaran McLarnon said: "The event is a great way to learn more about our fantastic bog lands, but is also a great family fun day with the Bog Olympics for children, face painting, kids' art, a mega quiz and turf cutting demonstrations. We hope lots of people come along to join in and to cheer on the competitors."

The International Bog Day event will be held at Peatlands Park between noon and 5pm. Admission is free and the Peatlands Railway will also be operating free throughout the afternoon.

For more information, log on to www.biodiversityni.com.