Chilham Castle Duathlon Standard and Sprint Duathlons are set in 300 acres of privately-owned beautiful castle grounds near Canterbury, Kent. Starting with a 10km off road run held within the picturesque grounds of Chilham Castle with views of the castle and Canterbury Cathedral. This will be followed by a very fast but challenging cycle route partly ridden on a designated cycle time trial route then finishing off with a 5km run again in the park.