Dundrod, County Antrim, Northern Ireland, Great Britain
Circuit Type: Temporary road course
Original Circuit
Extension: 11,934 Km
Lap Record: 04:44.000
Year: 1951
Driver: Giuseppe Farina
Car: Alfa Romeo 159
Speed: 151,301 Km/h
Pole Record: 04:51.000
Year: 1953
Driver: Mike Hawthorn
Car: Ferrari 500
Speed: 147,637 Km/h
| Year | Official Name | Date | Winning Driver | Constructor | Laps | Time | Formula |
|---|---|---|---|---|---|---|---|
| 1953 | VII Ulster Trophy | May 16 |  Mike Hawthorn |
 Ferrari |
14 | 01:12:01.600 | F1EC |
| 1952 | VI Ulster Trophy | June 7 | Piero Taruffi |
Ferrari |
34 | 03:05:47.000 | F1EC |
| 1951 | V Ulster Trophy | June 2 | Giuseppe Farina |
Alfa Romeo |
27 | 02:11:21.800 | F1EC |
| 1950 | IV Ulster Trophy | August 12 | Peter Whitehead |
Ferrari |
15 | 01:19:09.000 | F1EC |