Folkestone (fōkˈstən) [key], town (1991 pop. 42,949), Kent, SE England. The town is a summer resort with an active port. The Leas promenade runs along the chalk cliffs overlooking the English Channel. Folkestone is one of the main passenger ports used by the English Channel ferry operators; Boulogne, France is 26 mi (42 km) away. It is also Great Britain's terminus of the Channel Tunnel. There are vestiges of Roman occupation in the vicinity, and a 13th-century parish church has been restored. Folkestone was a prosperous port in the Middle Ages and early modern period.