|Native name: an Tiaracht|
An Tiaracht seen from Inis Tuaisceart
|Highest elevation||200 m (700 ft)|
|Pop. density||0 /km2 (0 /sq mi)|
|Elevation||200 m (660 ft) |
|Prominence||200 m (660 ft) |
At longitude 10° 39.7' Tearaght is the westernmost of the Blasket Islands, and thus the westernmost island of Ireland. It is also the westernmost point in Europe excluding Iceland and the Azores. However, there are some exposed rocks further west: Tearaght Rocks, Tearaght Rocks West (10° 41.0'), and Foze Rocks (10° 41.3').
An Tiaracht is about a kilometre from east to west, and 500 metres (1,600 feet) from north to south. The island is divided into two sections, a larger eastern part (200 metres (660 feet) high) and a western part that rises to 116 metres (381 feet). A narrow neck of rock, with a natural tunnel through it, joins the two parts.
|Source: Central Statistics Office. "CNA17: Population by Off Shore Island, Sex and Year". CSO.ie. Retrieved October 12, 2016.|
Like the other Blasket Islands, an Tiaracht holds large numbers of seabirds, with internationally important populations of Manx shearwater and European storm-petrel. Leach's storm-petrels have also been found there (but not proved to be breeding) in recent years. The number of auks, especially puffins, has apparently fluctuated greatly, though early records are not always reliable.
A lighthouse was established on the island in 1870, and automated in 1988. The lighthouse, maintained by the Commissioners of Irish Lights, has a tower 17 metres (56 feet) high and the focal height is at 84 metres (276 feet) above sea level, it has a range of 19 nautical miles (35 kilometres; 22 miles). The island also features the steepest funicular rail track in Europe.
- "Inishtearaght". Commissioners of Irish Lights. Retrieved 19 September 2010.
- "Dingle West Area - Tearaght Island". MountainViews. Ordnance Survey Ireland. Retrieved June 11, 2015.
- "Tearaght Island". logainm.ie. Irish Placenames Commission. Retrieved 19 September 2010.
- The British Isles: A Trivia Gazetteer By Paul Anthony Jones; Published by Summersdale Publishers LTD., pg. 311
- "Ireland" (PDF). Marine Claims. U.S. Navy Judge Advocate General. p. 3, Part F, Nos 32, 33. Retrieved 19 September 2010.
- NIMA (2004). Ireland and the West Coast of England Enroute. Prostar Sailing Directions. ProStar Publications. p. 42. ISBN 978-1-57785-556-9. Retrieved 19 September 2010.
Great Foze Rock lies about 3 miles SSW of Tearaght Island