Sprint and Standard Distance Duathlons. Traffic-free, fast and very flat (non-drafting).The Bedford Autodrome Duathlons are based around the beautiful and historic Thurleigh Airfield. Now turned into a motor racing track you will be treated to a 5km or 10km run around the smooth, pan-flat race circuit, then back into the 'pit lane' for transition to your bike, followed by a pan-flat but technical bike course (2 laps for the standard distance), finishing with a 5km lap of the race track to finish.You will love it, it's truly fantastic and totally traffic free!