I've ticked most of the 'must-do' boxes in my 20 years of running, from 5Ks to marathons, a multi-day event and even a night run. But I've never raced a mile, attempted cross-country or donned fancy dress. Nor have I run a European city marathon

© Getty Images If 26.2 miles just isn't enough, an ultra could be the race for you. Races longer than a marathon, ultras range from 30 miles to hundreds of miles and take place in hundreds of beautiful locations from Sussex to the Sahara

Baldaro. “You can overcome this by choosing a completely new challenge. Try a duathlon, an adventure race or take up a new activity like tennis or yoga to help both your body and mind recover from the rigours of a marathon.” 4. Redecorate or get married

London Marathon. Tick. Great North Run. Tick. You’ve crossed off some classic British races from your to-do list but there’s a whole world waiting out there for your next racing kick. Whether you fancy soaking up the amazing atmosphere of New

.Duathlons are raced over sprint distances, such as 2mile/10mile/2mile, short distances, such as 8mile/24mile/ 8mile or much longer distances, a prime example of which is the 10K/150K/30K Zofingen Powerman. The 2008 World Long Distance Duathlon Champion Catriona