The Trigo Cup also known as the Ulster Greyhound Derby was a greyhound racing competition held annually at Celtic Park in Belfast, Northern Ireland.
It was introduced in 1926 when William Barnett presented a cup to Celtic Park after his horse Trigo won the Epsom Derby and St Leger Stakes. The Trigo Cup would gain classic status some years later in 1944.
The race ended following the closure of Celtic Park..