100km along the oldest footpath in Britain.The UK's largest multi-day ultra event 16th to 17th July 2015. Follow in the footsteps of Romans, Vikings, farmers and traders from the rolling hills of Oxfordshire, over the Thames and up onto the ancient down-lands of Salisbury plain finishing at the largest Neolithic stone circle in Europe at Avebury. You are fully supported throughout the challenge and you can choose to complete the course non-stop or break it into two days staying at our overnight base camp.