A trainee teacher from Hertfordshire will take on the land of fire and ice to fundraise for the Alzheimer's Society.
Barny Shergold from Ashwell, will be one of more than forty trekkers who will hike across Iceland for nine-days next year.
Mr Shergold said he chose the Alzheimer's Society as his charity because of the nature of the disease.
"To be honest, it frightens the life out of me. I have had several elderly relatives who had the symptoms, although they died before the disease became full- blown," he said.
"One out of five people over the age of eighty will develop dementia and with us all living longer that will mean, if no cure is found, a huge number of people will go on to develop the disease. We all have to do our bit to stop this happening," he added.
Mr Shergold will cover 80 kilometres on his trek over some very difficult terrain, but he hopes to raise £80,000 to accompany his quest – one pound for every kilometre.
Neil Hunt, chief executive of the Alzheimer’s Society, said:
"Barny has set himself an amazing fundraising challenge and we wish him every success. As a charity we rely on the support of people like Barny whose fundraising efforts ensure that we can keep on searching for a cure whilst providing support and advice to people with dementia and their carers.
"We’d like to thank Barny for taking on our Iceland challenge. We’re sure he will have the trip of a lifetime."