Paddle boarder Nick Judd will set off on the river Thames from Abingdon.
Leaving at dawn, he hopes to reach the Eyot Centre in Henley at dusk.
A Wokingham resident, he’s also a paddle board instructor, and founder of Wargrave paddle board centre, Go With The Flo.
The event is not a race, it’s more of an endurance test because the plan is to be on the water for 18.8 hours.
“I’m doing this to raise money for Age UK Berkshire,” Mr Judd says.
“It’s the equivalent of 1128 minutes, one for every person currently living with dementia in Wokingham.”
Mr Judd’s father was diagnosed with dementia, and attends the charity’s dementia walks and cafés.
“Age UK Berkshire has been a godsend for my family,” Mr Judd says.
“Its services have been really good for my dad.
“The singing café in particular has helped him a lot.”
Mr Judd has already raised £1,500 for the charity with his paddle board challenge, but hopes to reach £2,000.
He has also been accepting extra fund raising challenges to perform on the day.
Because of this he will be performing headstands on his board at every lock he encounters.
But the real hurdles will be the weather and the length of time on the water.
“Paddling in the rain and against the wind is hard going,” he says.
“And this will be the longest time I have spent on the board.”
The event takes place on Saturday, June 18.
“I picked the longest Saturday in the year just because it gives me more daylight hours,” he adds.
“But it is fitting that it’s Fathers’ Day too.”
Due to his condition, Nick’s father will be unaware of the event.
“If your dad is still around, make the most of him,” adds Mr Judd.
Nick Judd’s giving page will be accepting donations for a month after the event.
To find out more, or to sponsor him, visit his fundraising page: localgiving.org