The course is 10.92 miles (17.63 km) long and is in the parish of Onchan in the Isle of Man. The course uses two short sections of the Snaefell Mountain Course which includes the primary A18 road between Cronk-ny-Mona and Creg-ny-Baa used in the reverse direction. Also, the primary A18 Mountain Road between Signpost Corner and Governor's Bridge. The highest point of the course is 261 metres above sea level at Ballacarrooin Hill (Ordnance Survey ). The name Clypse is probably a contraction from the Scandinavian word "Kleppsstar" ( Kleppr's farm) which gives the modern name of Clypse Beg and Clypse Mooar.