THE biggest off-road bike event of its kind in the UK will take place in Kielder Forest.

Over 1,600 riders have signed up to take part in the Dirty Reiver challenge this April.

The course will see some bikers tackle a 200km single lap on specialist gravel bikes - a cross between a mountain and road bike with drop-down handlebars.

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Bryan Singleton, of Focal Events, who is organising the challenge in partnership with Forestry England, explained: “Gravel biking started in North America, but over the last few years, its popularity has soared in the UK with Kielder emerging as its spiritual home.

"The scale of the forest is amazing, making it the perfect place for the ultimate two-wheeled adventure. 

"Of those taking part, 80 per cent will attempt the full 200-kilometre distance, which has a 3,000-metre elevation, with the remainder testing themselves against 130 and 60-kilometre circuits. 

"We also have an e-bikes category, underlining that gravel biking is one of the most accessible forms of riding.”

For the first time, the challenge will also have a team using specially adapted bikes.

Alex Maclennan, Forestry England’s recreation and public affairs manager for Northumberland, added: “The ultimate prize is crossing the finishing line. The Dirty Reiver is very much a personal challenge. 

"We stage lots of biking events in Kielder, but this one is unique. It’s fantastic to see the event open up to an even wider audience this year – the nation’s forests are here for everybody to enjoy.  

"Nothing beats the exhilaration of conquering the elements in England’s biggest woodland. It’s something participants will remember for the rest of their lives.”

The first riders will set off from Kielder Castle at 7.45am on April 22 with the fastest expected to complete the 200km circuit in 6.5 hours.

The venue will host a village and expo from noon to 10pm on Friday and again on Saturday morning, which is open to anyone.

As well as amateur riders, the starting lineup includes former Tour De France competitors and ex-world champion Chris Boardman, the Government's National Active Travel Commissioner responsible for promoting cycling.