Two friends will be joining together to take on a marathon challenge next month. But while running one marathon is enough for many, they will be running four in four days.

Ben Letzer, 33, from Swanton Abbott, and Alan Bushell, 40, from Horsford, have been inspired to take part in the Great Barrow Challenge as they look to raise money for charity Children With Cancer UK.

Their reason is because mutual friend, Lynsay Shreeve, of Corpusty, near Aylsham, has a five-year-old son Ryan who is being treated for leukaemia at Addenbrooke's Hospital in Cambridge.

Mr Letzer said she was delighted that they were doing the run for the charity.

The 106-mile test of endurance will see the pair, who are both members of Coltishall Jaguars running club, cross Suffolk countryside. Each day they will begin at Barrow, near Bury St Edmunds, before travelling through forest, parkland, country lanes and a number of villages.

At the same time, other people will be walking, running or cycling a variety of distances from six to 125 miles a day.

Mr Letzer said: 'I have done a few marathons and we are both keen runners, but this will definitely be our toughest challenge yet.'

He said that the furthest he had run in training was 20 miles twice in two days, which he said was tough.

He added: 'It would probably not be good to go any further as it would risk injury and be detrimental.'

The Great Barrow Challenge takes place from September 21-24.

To sponsor the pair, visit www.justgiving.com/alanandben

Are you going the extra mile for charity? Call 01603 772423 or email richard.wood@archant.co.uk