The A18 Snaefell Mountain Road or Mountain Road is 15.30 miles long (24.62 km) road in the Isle of Man and is a primary road which connects Douglas with Ramsey. The A18 Mountain Road is part of Snaefell Mountain Course or Mountain Course, a road-racing circuit used for the Isle of Man TT and Manx Grand Prix Races held in the Isle of Man from 1911 and 1923 respectively. The racing is held on public roads closed for racing by an Act of Tynwald (the parliament of the Isle of Man). It is the oldest motor-cycle racing circuit still in use.