Challenge walks in the UK range from anything over half marathon distance (13+ miles / 20+ kilometres) right up to ultra challenges over either a single day, weekend or longer.
They could well involve some undulations but aren't geared around a summit target.
To refine your search, click + on the blue filters.
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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Things to do in an urban environment - everything from city walks to traffic-free rides.
Events, challenges and trips aimed at those starting out, trying something new, or just looking for a fun day out.
Focus on upcoming new destinations and events - as well as many traditional favourites such as London to Paris.
Everything from mountain biking to trail running - and what's great about going off the radar to find your outdoor escape.
Everything you need to help you choose between Kilimanjaro, Everest base camp, the Great Wall, Machu Picchu and more.
Weekend festival in June - range of events
22nd July - sign up for £50
Street Child Sierra Leone Marathon
17th June - sign up for £15
September - plenty of time for training
Available from June to September
May and July camps - from €375 per person
14th May - entries £14-£16
Sunday 28th May - sign up is £25
August - incredible six-day tour