Not for the faint-hearted, Original Source Mountain Mayhem will take over the stunning grounds of Eastnor Castle, Deer Park in Ledbury, where 2,500 thrill-seeking mountain bikers will compete in an intense nine-mile circuit over 24 hours.

Riders of all capabilities, from daring non-riders right through to national champions and Olympians, are invited to participate either as a solo-rider or as part of a four, five or ten-man team. A crowd of 15,000 spectators is also expected to turn out to watch the muddy mayhem.

The 24-hour race is part of a weekend of events that takes place from 19th-21st June 2009, kicking off with the Dirt Demo, the largest mountain bike demo in the country, which gives visitors the chance to test ride the latest equipment from top biking manufacturers.

The main arena includes a vast trade village full of fun free activities for all the family, including the Mini Mayhem children’s bike skills course.

Visitors will also be treated to a whole host of other Original Source Mountain Mayhem activities at the festival-style weekend.

Patrick Adams of Pacific Edge Events, owners and organisers of Mountain Mayhem, said: “Since its beginning back in 1998, the event has grown and developed over the years to become the biggest 24-hour mountain bike endurance event worldwide. This year expect surprises, excitement and one of the best Mountain Mayhems to date.”

Entry forms for the event can be downloaded from from midnight on 28th February.

Entry costs £200 for teams of four-five riders, £265 for teams of 10 or £65 for soloist entry, which also includes a goody bag of freebies on the day and a medal for finishing. Camping and spectator entry at the event is free.