Intrepid former pupils of Windsor Boys' School will drive 17,000 miles to Mongolia and back without a map to raise cash for a children's charity.
Ben Cox, James McGrath and Rob Hope, all 36, will set off on the five to seven week adventurous Mongol Rally from Goodwood Racecourse on Saturday, July 14.
The three good friends hope to raise more than £10,000 for the Alexander Devine Children's Hospice Service and will be joined by about 300 other teams.
They will drive a modded 1.1 litre Renault Kangoo called Stompy, taking in three deserts, five mountain ranges and 23 countries including Georgia, Turkmenistan, and Kazahkstan.
Windsor-born Ben, who moved to Brighton 10 years ago, said they wanted to do a different challenge and are 'excited' by the adventure that lies ahead.
The British Gas engineer said: "We know there is going to be hostility along the way, and have heard there is corruption, but we are prepared for the worst.
"We expect dodgy police with fake breathalysers and speed guns and have heard this happens in places near the Caspian Sea."
He and friends James, of Osborne Road, Windsor, and Rob, who lives in Los Angeles, will sleep in their van in bunk beds during the trip outside famous landmarks.
The former pupil at St Peter's Middle School, Old Windsor, said they will not use maps as they want it to be as challenging as possible, but intend on following the old Silk Road trade route.
Visit www.justgiving.com/onlyfoolsandhorsepower to donate.
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