Croaghgorm or Bluestack is a 674 m (2,211 ft) mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

 in County Donegal

County Donegal

County Donegal is a county in Ireland. It is part of the Border Region and is also located in the province of Ulster. It is named after the town of Donegal. Donegal County Council is the local authority for the county...

, Ireland

Republic of Ireland

Ireland , described as the Republic of Ireland , is a sovereign state in Europe occupying approximately five-sixths of the island of the same name. Its capital is Dublin. Ireland, which had a population of 4.58 million in 2011, is a constitutional republic governed as a parliamentary democracy,...

. It is the highest of the Bluestack Mountains

Bluestack Mountains

The Bluestack Mountains or Blue Stack Mountains, also called the Croaghgorms , are the major mountain range in the south of County Donegal, Ireland. They provide a barrier between the south of the county, such as Donegal Town and Ballyshannon, and the towns to the north and west such as Dungloe and...

 (aka the Croaghgorms) and the third-highest mountain in County Donegal.

On 31 January 1944, during World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

, a Royal Air Force

Royal Air Force

The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

 (RAF) Sunderland

Short Sunderland

The Short S.25 Sunderland was a British flying boat patrol bomber developed for the Royal Air Force by Short Brothers. It took its service name from the town and port of Sunderland in northeast England....

 plane crashed on the mountain. Seven RAF crewmen from 228 Squadron

No. 228 Squadron RAF

No. 228 Squadron RAF was a unit that during the greatest part of its existence flew over water, doing so in World War I, World War II and beyond, performing anti-submarine, reconnaissance and air-sea rescue tasks.-Formation and World War I:...

were killed. Wreckage from the plane can still be seen on the mountain's slopes. A memorial plaque was unveiled in 1988.