Following the success of last year's Battle of Britain Cycle Challenge, this year sees cyclists scaling the heights of the Alps, as they journey from Paris to Geneva, all in aid of the RAF Benevolent Fund.
Today, a team of seven take the Eurostar to Paris, ready to begin their epic challenge, which sees them take in 363 miles over four days.
With individuals from RAF stations including RAF Odiham, RAF Northolt, RAF Lossiemouth and RAF High Wycombe, as well as one cyclist all the way from North America, the ride is set to be the challenge of the year.
Former fundraiser at the charity, Emily Fry, is one of those taking on the ambitious ride.
"I only started cycling at the beginning of the year," Emily says, "but I can't wait to experience the camaraderie on the ride itself.
"I've never attempted the amount of miles this challenge requires," she enthuses, "so it will definitely be a personal achievement passing the finish line in Geneva!"
RAF Benevolent Fund Regional Director Paul Hewson commented: "Without the support of individuals like these, and everyone who is taking on this incredible challenge for us, we wouldn't be able to deliver the array of services we do for our beneficiaries. We really appreciate the time and effort they are giving, and their endeavours will ensure that we can help even more people, and continue to support the RAF family, for many years to come."
Regional Fundraiser Heather Kemp will greet the intrepid cyclists; Emily, Andy, Bruce, Jesse, Ian, Danny, Walter, Patricia and Alex; when they cross the line in Geneva on 9 September and join them for a well-deserved celebratory dinner. You can keep up to date with how everyone is doing by following the ride on our Twitter feed.
Best of luck everyone, and happy riding!