Croaghgorm
| Croaghgorm | |
|---|---|
| Cruach Ghorm | |
| Summit of Croaghgorm | |
| Highest point | |
| Elevation | 674 m (2,211 ft) | 
| Prominence | 541 m (1,775 ft) | 
| Listing | Marilyn, Hewitt | 
| Coordinates | 54°45′15″N 8°04′52″W / 54.754171°N 8.081031°W | 
| Naming | |
| English translation | blue stack | 
| Language of name | Irish | 
| Geography | |
| Location | County Donegal, Ireland | 
| Parent range | Bluestack Mountains | 
| OSI/OSNI grid | G948895 | 
Croaghgorm or Bluestack (from Irish an Chruach Gorm, meaning 'the blue stack') is a 674-metre (2,211 ft) mountain in County Donegal, Ireland. It is the highest of the Blue Stack Mountains (or Croaghgorms) and the third-highest mountain in County Donegal.
On 31 January 1944, during World War II, a Royal Air Force (RAF) Sunderland plane crashed on the mountain. Seven RAF crewmen from 228 Squadron were killed. Wreckage from the plane can still be seen on the mountain's slopes. A memorial plaque was unveiled in 1988.