FRIENDS of Shoreham Fort are walking 50 miles, passing seven forts en route, in a 24-hour challenge.
The team of five will be setting out on Saturday to walk from Fort Nelson in Portsmouth to Shoreham Fort, off Forthaven on Shoreham Beach.
They will be trying to complete the fundraising challenge in less than 24 hours.
Andy Vincent, Gary Baines, Tony Gilfrin, Hayley Cropp and Craig Searle have been doing practice walks at least once a week, along the seafront between Kingston Lighthouse and Brighton Marina.
Craig said: “Fort Nelson will be firing their 64 pound cannon to start us off. It will be a rare and great experience for the cannon to be fired.”
The aim is to raise £1,857 for Shoreham Fort, to correspond with the year the fort was built.
So far, £760 has been pledged online. Visit www.sponsorme.co.uk/andrewvincent/the-long-walk to donate.
Friends of Shoreham Fort is a charity set up to restore and preserve Shoreham Fort.
Members organise events for the community to enjoy at the fort, including the annual military history weekend at the beginning of June.