The group, which includes three veterans, will take part in the 26.2 mile hike through areas including Esher, Cobham and Hersham.
They will be setting off from the Royal British Legion at 7.30am on May the 23rd and returning at around 4.30 afternoon.
They have already raised over £2,000 to go towards the RBL as well as Royal Star and Garter charity.
