Dore is a large village in South Yorkshire, England. The village lies on a hill above the River Sheaf which gave Sheffield its name, and until 1934 was part of Derbyshire, but it is now a suburb of the city. Dore is served by Dore and Totley railway station on the Hope Valley Line between Sheffield and Manchester. The railway tunnel between Dore and Totley under a limb of the Pennines to Grindleford in Derbyshire is the longest such in England, second only to the Severn Tunnel between England and South Wales. They are the longest main line railway tunnels anywhere in Great Britain – the London Underground and Channel Tunnel to France excepted.