Lists of mountains and hills in the British Isles in England, 366 in Wales and 11 in the Channel Islands. A Simm is a mountain the British Isles that is over high and has a prominence of at least . The word comes from Six-hundred Metre Mountain. There are currently 2,754 recorded Simms in the British Isles, including 2,188 Scottish Simms, 192 English Simms, 149 Welsh Simms, 1 Isle of Man Simm, and 224 Irish Simms. By definition, all Simms are also TuMPs (see below) and most, if not all, are mountains, depending on whether 600 metres or 2,000 feet (610 m) (e.g. a ), is used as the
Hillclimbing in the British Isles the hills. All the courses in Great Britain are situated on private land, but some events in the Channel Islands and all events in Northern Ireland are held on closed public roads. Track lengths are traditionally quoted in yards: the longest hillclimb course used in the British Championship is Harewood at 1583 yards (1447 m), and the shortest is Val des Terres at 850 yards (777 m). The longest hillclimb currently in use in the British Isles is Cairncastle, located just north of Larne in County Antrim, N.Ireland. Run by Larne Motor Club, It is 1.65 miles long . A