A 15-strong group of cyclists will saddle up and cycle 90 miles for three days straight in aid of charity.
The group – named the Haddenham Hillbillies – will set off from Thame to Montesson in France on Wednesday in a bid to raise £9,000 for the Florence Nightingale Hospice.
Group member Justin Shardlow said: “We decided to commemorate the hospice’s 25th anniversary year by cycling 90 miles a day, for three days straight.
“Training has involved three to four weekly cycles taking in as many hills as possible. The route from Caen to Montesson is very hilly but having the Chilterns to practice has been a great help.
“Some of the group also rode from Haddenham, Cambridgeshire, back to Haddenham in Oxfordshire recently as a training exercise which was just over 100 miles in total.”
A travelling supporter bus will also be leaving Thame on the same day to cheer on the cyclists as they leave England arrive in Montesson.
Justin added: “We’re hoping to raise £9,125 for this wonderful cause - a £1 for every day it has been open.”
To donate, visit http://make-a-donation.org/fundraisers/haddenham-hillbillies-2014.