Riding challenges can be the perfect way to cover long distances, especially on uneven terrain, and there are options from around the world.
It's a wonderful way to get off the beaten track and away from crowds - and see landscapes that might be difficult to negotiate on two feet, or by bike.
Take a look through the challenges and then enter a few basic details to get instant access to further information.
If you would like to do this as a group and there are more than 15 of you, we can help you find a reputable organiser to sort everything out.
Simply complete the form below and we'll be in touch shortly.
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Go the distance with these extreme runs, rides, walks and triathlons in the UK and around the world.
Is this the ultimate year-round multi-activity destination?
Things to do in an urban environment - everything from city walks to traffic-free rides.
London's Royal Parks - October 8
Great North Run – September 10
Great South Run - October 22
2nd Biggest Triathlon in the UK
Tough Mudder London South - September
8-day walking adventure in Tirol
70 miles - 17 June
3rd September - 79km & 41km options
Yorkshire Marathon - 8th October
Westminster 10K - 9 July