Two-time Olympic gold rowing champion James Cracknell has been promoting a new ultra marathon called the Race to the Stones, which covers 100km of our ancient Ridgeway Trail (North Wessex Downs helps to manage this 87-mile (139km) route).
The event takes place on July 13 and 14 and runs from Thame in Buckinghamshire to Avebury. Those less competitive participants can choose to walk the route over two days, staying at an overnight base camp at the halfway point. There are also pit stops every 10km where people can refresh and re-charge.
People who sign up for the route will receive detailed map books with all the pitstops marked on it to help navigate and arrange for any supporters to meet them along the way.
Cracknell, who finished 12th in the Marathon de Sables last year, making him the highest placed British competitor in its 25 year history, ran the last leg along The Ridgeway from Ogbourne St George to the Avebury Stone Circle on May 15 to publicise the event.
He told local journalists: "I have travelled the world in search of races in epic places. The Ridgeway's legendary history and great British scenery make it a classic challenge.
"Passing 5,000 year old burial chambers in the middle of the night and thinking about the generations of people who have trodden the route before will be a great experience."
People can take part to raise money for charity, to set a personal best over 100km or just to have a great weekend in the outdoors. More details at www.racetothestones.com.