Help the Aged is to hold a green cycling challenge from London to Paris.
Participants will cycle 300 kilometres over a weekend this September to raise money for the charity.
In keeping with the green theme of the event, all carbon emissions produced on the trip will be offset.
The first day will see participants cycle from London, across the countryside, to Newhaven, where cyclists will board a ferry to France.
Day two will be spent navigating through Normandy's villages, involving some steep hills.
On the final day, participants will head for the finishing line at the Eiffel Tower and indulge in a celebratory dinner.
Gemma Randall, events fundraiser at Help the Aged, said: "Cycle London to Paris 2007 is perfect for the environmentally conscious as it's eco-friendly, with all carbon emissions produced by support vehicles being offset on return to the UK.
"It's also a fantastic opportunity to embark on an adventure that will see participants enjoying amazing views, making new friends and raising money for a worthwhile cause."
Each contestant must raise at least £1,100 in sponsorship, which will help the charity continue its work to fight the isolation and neglect of the elderly.