# Clady Circuit

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Motorcycle racing circuit in Northern Ireland

Clady Circuit Short Circuit (1947–1952) Location County Antrim, Northern Ireland Coordinates 54°39′51″N 6°06′23″W / 54.66417°N 6.10639°W / 54.66417; -6.10639 Opened 1922 (re-opened 1947) Closed 1952 (firstly closed 1939) Major events Grand Prix motorcycle racing Ulster Grand Prix (1949–1952) Short Circuit (1947–1952) Length 26.501 km (16.467 mi) Turns 8+ Race lap record 9:21.000, 105.94 mph ( Les Graham, MV Agusta 4C, 1952, 500cc) Original Circuit (1922–1939) Length 32.992 km (20.500 mi) Turns 8+ Race lap record 12:17.800, 100.03 mph ( Dorino Serafini, Gilera, 1939, 500cc)

**Clady Circuit** situated in [County Antrim](/source/County_Antrim), [Northern Ireland](/source/Northern_Ireland) describes a motor-cycle [road racing](/source/Road_racing) [street circuit](/source/Street_circuit) used for the [Ulster Grand Prix](/source/Ulster_Grand_Prix). The Clady Circuit was used between 1922 and 1939 and an amended shorter circuit between 1947 and 1952.[1]

## History

The Clady Circuit, ([Irish](/source/Irish_language): ***Clóidigh***; i.e. *Washing river*) first used in 1922 for the Ulster Grand Prix was 20.500 mi (32.992 km) in length in County Antrim. The original course start line was situated near [Loanends](/source/Loanends) Primary School on the secondary B39 Antrim to [Belfast](/source/Belfast) Road. The event held on public roads closed for racing including the secondary B39 *Seven Mile Straight* between [Antrim](/source/Antrim%2C_County_Antrim) and Clady Corner including *Christy's Brae*, the primary A52 Belfast to [Crumlin](/source/Crumlin%2C_County_Antrim) Road between Clady Corner and Thorn Cottage, a tertiary road north from Thorn Cottage to Greenmount near the town of Antrim (including a section of [RAF Aldergrove](/source/RAF_Aldergrove)) and from Greenmount to Muckamore Corner with the road junction of the B39 'Seven Mile Straight.'

The Clady Circuit was shortened in 1947 to a length of 16.467 mi (26.501 km) with the omission of the Aldergrove section from Thorn Cottage to Greenmount. The *short* Clady Circuit now ran from Clady Corner to [Nutts Corner](/source/Nutts_Corner) on the primary A52 Belfast to Crumlin Road and used a section of the primary [A 26](/source/A26_road_(Northern_Ireland)) [Banbridge](/source/Banbridge) to [Coleraine](/source/Coleraine) Road from Nutts Corner to Muckamore House near Antrim. For the [1953](/source/1953_Grand_Prix_motorcycle_racing_season) racing season the Clady Circuit was abandoned for motor-cycle racing and the [Ulster Grand Prix](/source/Ulster_Grand_Prix) as part of the [FIM](/source/F%C3%A9d%C3%A9ration_Internationale_de_Motocyclisme) [Motorcycle Grand Prix World Championship](/source/Grand_Prix_motorcycle_racing) was moved to the nearby [Dundrod Circuit](/source/Dundrod_Circuit) in Co Antrim.

## Speed and Race Records

The lap record for the *short* Clady Circuit is 9 Minutes and 21 seconds at an average speed of 105.94 mph (170.49 km/h) set by [Les Graham](/source/Leslie_Graham) riding a 500cc [MV Agusta 4C](/source/MV_Agusta_500_racers#MV_Agusta_500_4C_1950–1966) during the [1952 Ulster Grand Prix](/source/1952_Ulster_Grand_Prix). The lap record for the 1922–1939 Clady Circuit is 12 minutes and 17.8 seconds at an average speed of 100.03 mph (160.98 km/h) by [Dorino Serafini](/source/Dorino_Serafini) riding a 500cc [Gilera](/source/Gilera) motor-cycle during the [1939 Ulster Grand Prix](https://en.wikipedia.org/w/index.php?title=1939_Ulster_Grand_Prix&action=edit&redlink=1). The race record for the *short* Clady Circuit is an average speed of 99.79 mph (160.60 km/h) set by [Cromie McCandless](/source/Cromie_McCandless) riding a 500cc Gilera also during the 1952 Ulster Grand Prix.[2]

## See also

- [Ulster Grand Prix](/source/Ulster_Grand_Prix)

- [North West 200](/source/North_West_200)

- [Isle of Man TT Races](/source/Isle_of_Man_TT_Races)

## Sources

1. **[^](#cite_ref-1)** Morrison, Ian (1991). *The Guinness Motorcycle Sport Fact Book* (1st ed.). London: Guinness. p. 148. [ISBN](/source/ISBN_(identifier)) [978-0-85112-953-2](https://en.wikipedia.org/wiki/Special:BookSources/978-0-85112-953-2).

1. **[^](#cite_ref-2)** Morrison, Ian (1991). *The Guinness Motorcycle Sport Fact Book* (1st ed.). London: Guinness. p. 19. [ISBN](/source/ISBN_(identifier)) [978-0-85112-953-2](https://en.wikipedia.org/wiki/Special:BookSources/978-0-85112-953-2).

v t e Northern Ireland racing circuits Aghadowey Ards Armoy Ballyclare Ballymena Bangor Bishopscourt Carrowdore Clady Cluntoe Coleraine - The Triangle Cookstown - Orritor Circuit Cranfield Donaghadee Dundrod Dungannon - Bush Road Kirkistown Lake Torrent Long Kesh Mid - Antrim Newtownards Nutts Corner St Angelo Tandragee Tullyroan Oval White Mountain - Lisburn

v t e Grand Prix motorcycle racing circuits (1949–present) Current (2026) Buriram Goiânia Austin Jerez Le Mans (Bugatti) Catalunya Mugello Balaton Park Brno Assen Sachsenring Silverstone Aragón Misano Spielberg Motegi Mandalika Phillip Island Sepang Lusail Algarve Valencia Future (2027) Adelaide Returning (2027) Buenos Aires Former Albi (Les Planques) Anderstorp Bremgarten Buddh Clady Clermont-Ferrand Daytona Donington Park Dundrod Eastern Creek Estoril Fuji Geneva Hedemora Hockenheimring Hungaroring Imatra Imola Indianapolis Interlagos Isle of Man (Clypse Course) Isle of Man (Mountain Course) Istanbul Jacarepaguá Jarama Johor Karlskoga Kristianstad Kyalami Laguna Seca Magny-Cours Montjuïc Monza Mosport Nogaro Nürburgring Opatija Paul Ricard Reims Rijeka Rouen Salzburgring San Carlos Schottenring Sentul Shah Alam Shanghai Solitudering Spa-Francorchamps Suzuka Tampere Termas de Río Hondo Welkom Zolder

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Adapted from the Wikipedia article [Clady Circuit](https://en.wikipedia.org/wiki/Clady_Circuit) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Clady_Circuit?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.