Help for Heroes boosts its coffers each year by organising a number of challenges that take place all over Britian and Europe.

Among the challenges that people can enter in 2011 is the Hero Walk which goes from Avebury to Stonehenge on June 26.

A spokesman for the charity said: “The Hero Walk is a very tough challenge over the high chalk downs and ridge ways of Wiltshire and Salisbury Plain.

“At 26 miles it forms a marathon for runners and a great challenge for walkers.

“This challenge is a diverse trek over marathon distance, going back through 6,000 years of British history; the magnificent prehistoric stone circles of Avebury and Stonehenge need little introduction.

“The challenge will start in Avebury, where we will be able to get up close to the ancient stones before heading off via the mysterious ancient landmark of Silbury Hill. Silbury is the tallest man-made mound in Europe, however its purpose is still unknown.

“We will then cross the spectacular chalk downs dotted with ancient earth-works, burial mounds and get up close to the enigmatic white horses carved into the chalk.

“ In clear weather we will be able to see more here, as views of other valleys open up to us. The route takes in the highest point in Wiltshire (295m) and travels through the most active crop circle area in the world – keep your eyes open.”

For details of how to enter go to helpforheroes.org.uk