Croaghaun ( ga, Cruachán) is a

mountain A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock. Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher ...

Achill island Achill Island (; ga, Acaill, Oileán Acla) in County Mayo is the largest of the Irish isles, and is situated off the west coast of Ireland. It has a population of 2,594. Its area is . Achill is attached to the mainland by Michael Davitt Brid ...

County Mayo County Mayo (; ga, Contae Mhaigh Eo, meaning "Plain of the yew trees") is a county in Ireland. In the West of Ireland, in the province of Connacht, it is named after the village of Mayo, now generally known as Mayo Abbey. Mayo County Counci ...

Ireland Ireland ( ; ga, Éire ; Ulster-Scots: ) is an island in the North Atlantic Ocean, in north-western Europe. It is separated from Great Britain to its east by the North Channel, the Irish Sea, and St George's Channel. Ireland is the s ...

. At 688 metres (2,257 ft), it has the highest sea

cliff In geography and geology, a cliff is an area of rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. Cliffs are common on co ...

s in Ireland as well as the third highest sea cliffs in

Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...

(after

Hornelen Hornelen is a mountain in Bremanger Municipality in Vestland county, Norway. The mountain sits on the eastern end of the island of Bremangerlandet, along the Frøysjøen strait, in the Nordfjord region of Norway. At , it is the highest sea cli ...

Norway Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of ...

and Cape Enniberg,

Faroe Islands The Faroe Islands ( ), or simply the Faroes ( fo, Føroyar ; da, Færøerne ), are a North Atlantic island group and an autonomous territory of the Kingdom of Denmark. They are located north-northwest of Scotland, and about halfway bet ...

Geography

Croaghaun is the most westerly peak of

Achill Island Achill Island (; ga, Acaill, Oileán Acla) in County Mayo is the largest of the Irish isles, and is situated off the west coast of Ireland. It has a population of 2,594. Its area is . Achill is attached to the mainland by Michael Davitt Brid ...

, and its highest mountain. Its cliffs lie on the northern slope of the mountain. The cliffs at Croaghaun can only be seen by

hiking Hiking is a long, vigorous walk, usually on trails or footpaths in the countryside. Walking for pleasure developed in Europe during the eighteenth century.AMATO, JOSEPH A. "Mind over Foot: Romantic Walking and Rambling." In ''On Foot: A Histor ...

around or to the summit of the mountain, or from the

sea The sea, connected as the world ocean or simply the ocean, is the body of salty water that covers approximately 71% of the Earth's surface. The word sea is also used to denote second-order sections of the sea, such as the Mediterranean Sea, ...

. They are part of a sequence of sheer rock faces which start south of

Keem Bay Keem Bay ( ga, Cuan na Cuime) is located past Dooagh village in the west of Achill Island in County Mayo, Ireland. It contains a Blue Flag beach. The bay was formerly the site of a basking shark fishery. The bay was used as a filming location ...

and loop around the uninhabited north-west of the

island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An isla ...

, by Achill Head and Saddle Head, and east to

Slievemore Slievemore () is the second highest peak on Achill Island after Croaghaun, in County Mayo, Ireland. Its elevation is 671 m (2,201 ft). Archaeology In 1991, the Achill Archaeological Field School was opened. That year, the Deserted Village Proje ...

, occasionally dropping vertically into the waters of the

Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...

Nature

The Croaghaun cliffs are home to two families of peregrine falcons (''RTÉ'', 2008). September and October are the best time to see the fastest creatures on Earth here, as they teach their young to fly. Metamorphic,

quartz Quartz is a hard, crystalline mineral composed of silica ( silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical f ...

-laden gems may be observed, along with Mediterranean heathers and the waters of the Atlantic. It is common to see schools of

bottlenose dolphin Bottlenose dolphins are aquatic mammals in the genus ''Tursiops.'' They are common, cosmopolitan members of the family Delphinidae, the family of oceanic dolphins. Molecular studies show the genus definitively contains two species: the comm ...

s and

basking shark The basking shark (''Cetorhinus maximus'') is the second-largest living shark and fish, after the whale shark, and one of three plankton-eating shark species, along with the whale shark and megamouth shark. Adults typically reach in leng ...

s, once a source of revenue for Achill Island (''BBC'', 2009).

Porpoise Porpoises are a group of fully aquatic marine mammals, all of which are classified under the family Phocoenidae, parvorder Odontoceti (toothed whales). Although similar in appearance to dolphins, they are more closely related to narwhals a ...

s are found in large numbers.

Orca The orca or killer whale (''Orcinus orca'') is a toothed whale belonging to the oceanic dolphin family, of which it is the largest member. It is the only extant species in the genus '' Orcinus'' and is recognizable by its black-and-white ...

humpback whale The humpback whale (''Megaptera novaeangliae'') is a species of baleen whale. It is a rorqual (a member of the family Balaenopteridae) and is the only species in the genus ''Megaptera''. Adults range in length from and weigh up to . The hu ...

s, and other

whale Whales are a widely distributed and diverse group of fully aquatic placental marine mammals. As an informal and colloquial grouping, they correspond to large members of the infraorder Cetacea, i.e. all cetaceans apart from dolphins and ...

s have been sighted. Europeancliffs

Geography

Nature

See also