For most people running just one marathon of 26 miles is daunting enough, but for Andy Nichols that will be just the beginning.
He is looking to complete the Norfolk Ultra Marathon of 100 kilometres or 62 miles along the North Norfolk coast.
Mr Nichols, 40, of Lynn’s Reffley Estate, is raising money for Norfolk charity Nelson’s Journey, which helps children work through family bereavement.
Mr Nichols said: “Last year my son Harry lost his granddad and he still struggles to come to terms with what has happened.
“Nelson’s Journey has helped my family out enormously and I just wanted to give something back.”
The Ultra-Marathon begins at Kelling Heath and follows the coastal road 31 miles to Brancaster before the runners turn around and head back.
Saturday’s race begins at 8am and runners have until midnight to finish.
Mr Nichols, who works at 13 Fitness said: “Gym owner Mark has been brilliant, he supplied me with my trainers for the event.
“All the gym members have been really supportive and I’ve been training in here every morning to prepare myself for such a long run.
“My family have also helped to keep me going.
“The furthest I’ve managed competitively is a full marathon but this is double that with another 10 miles on top.”
Mr Nichols is hoping to raise £1,000 for the charity. To donate, please visit www.justgiving.com/Andrew-Nichols1.