Duathlons are perfect for those who want to do a triathlon or multi-activity event, but don't want to swim.
They involve three stages - a run, a cycle and another run, with transitions in between, which all count towards your combined overall time.
They also tend to appeal to off-road cyclists more than triathlons, with the biking element often taking place on tracks and trails rather than tarmac.
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Training camps for all levels - running, cycling, triathlon and many more activities this winter and into 2017.
Challenge yourself next year with these walks, treks, bike rides and runs from around the world.
Details of skiing, snowboarding and other winter trips available late this year and into 2017.
Get in early and sign up now for these special runs, walks and rides in the UK next year. (London Marathon ballot announced this week)
See the world's most iconic cities - by foot or by bike.