Greencastle Golf Club is a beautiful 18 hole links course which nestles in the idyllic surrounds of the Inishowen Peninsula. It is a members owned course on the banks of, and superb views across, Lough Foyle. It is based in the north of the Inishowen peninsula in County Donegal. The club was founded in 1892 as a nine hole course and during it's centenary year opened a further nine, very challenging holes.

The course is 5269 metres in length with a par of 69, and a SSS of 67 off the competition tees. There are six par three holes and a stream / drain comes into play on three holes.