For most of the year, the A5, the A28, the A7 and the A3 are simply roads. Farm tractors use them. Mothers drive their children to school along them. Pedestrians walk dogs beside their hedgerows. Then, in a few specific weeks each year, an Act of Tynwald closes 4.25 miles of these public roads to ordinary traffic, and they become a motorcycle racing circuit instead - the Billown Circuit, where the fastest road racers in the world thread their machines between stone walls at speeds that would be illegal anywhere in Britain.
The Isle of Man's parliament, Tynwald, can do what almost no other legislature in the world can: it can close ordinary public highways and turn them over to road racing. This power is what makes the island the spiritual home of motorcycle road racing - not circuit racing on purpose-built tracks, but racing on real roads with real hedges and real stone walls and real lamp-posts. The Billown Circuit uses parts of the primary A5 New Castletown Road, the A28 Castletown to Ballabeg road, the A7 Ballasalla to Port Erin road, and the A3 Castletown to Ramsey road. The start line sits on the outskirts of Castletown. The course runs through the parishes of Arbory and Malew. Riders complete a circuit of 4.25 miles in a few minutes; they will do many laps in a race.
The circuit exists because another one closed. The former RAF station at Andreas, at the north of the island, had been used for post-war motorcycle racing through the early 1950s. When Andreas closed to bikes in 1954, the Southern Motor Cycle Club found itself looking for a new venue. The 1954 Manx Grand Prix had been won, in part, by two riders from the south of the island - George 'Sparrow' Costain and Derek Ennett - and the SMCC saw an opportunity. They proposed a 'South TT' using roads around the new Castletown bypass and the Billown Mansion. The Tynwald Race Committee turned them down for a £500 grant in April 1955. Local businesses came up with the money instead. T. H. Coleburn paid for the public address system. The first Southern 100 ran in July 1955, as a club-level meeting. The Billown Circuit became a regional registered circuit the following year, and a National Racing circuit in 1957.
The Southern 100 is what people mean when they talk about Billown. Held every July, it draws road-racing specialists from across the British Isles and beyond - riders who learn their craft on closed public roads in Ireland, the Isle of Man, and northwest England. The corner names tell the story of the course: Castletown Corner, Williams Corner, Great Meadow, Church Bends, Iron Gate, Ballakeighan, Ballanorris, Ballawhetstone, Stadium Bends, the Billown Dip - known to riders as 'Black hole' because of how the road drops away beneath you. Each name marks a piece of agricultural geography that became a motorcycle landmark. Each name also, for those who race here regularly, marks places where friends have died.
Road racing is dangerous in ways closed-circuit racing simply is not. There is no run-off. The verge is a stone wall, or a fence, or a tree. The list of riders killed at Billown since the first Southern 100 in 1955 is long - thirty names recorded, spread across practice sessions and races, sidecar passengers and solo riders, men in their early twenties and men in their sixties. James Cowton in 2018, at Stadium Bends. Dean Martin in 2016 at Billown Dip during a Pre-TT Classic practice. Mark Madsen-Mygdal, Paul Thomas, David Jukes - all in 2013 alone. Alan Connor in practice for the 2023 Southern 100. These were skilled professionals who knew exactly what they were risking. The road-racing community treats them with the kind of solemnity that belongs to people who chose their lives knowing the price - and the families and clubs continue, year after year, in part because stopping would feel like a betrayal of what those riders loved.
Outside the racing weekends, Billown is just south Manx countryside - quiet lanes, stone walls, hedgerows, the limestone bulk of Castle Rushen visible in one direction and Bradda Head in another. The Billown Mansion sits in its parkland; Malew Church, with its graveyard at Church Bends, drowses on its little rise. The Pre-TT Classic meeting brings vintage machines here every May, the Southern 100 follows in July, and the National Road Races happen too. For a few weeks the air smells of two-stroke oil and burning petrol, the village ear-plug shops do brisk trade, and crowds line the verges with cameras. Then the roads reopen. The cows come back to the meadows behind Great Meadow corner. Billown becomes, again, the place where people live and farm and drive to the shops - the most remarkable thing about it being that, on perfectly ordinary roads, it has hosted seventy years of one of the strangest and most beautiful sports in the world.
Located at 54.088°N, 4.665°W in the south of the Isle of Man, immediately west of Castletown. The 4.25-mile circuit forms an irregular ring through farmland in the parishes of Arbory and Malew. Ronaldsway Airport (EGNS) is 4km east. The course is essentially invisible from altitude except during race weekends in May (Pre-TT Classic) and July (Southern 100), when crowds and marshal posts mark it out. Look for the Billown Mansion, Malew Church (Church Bends), and the A5 bypass forming the southern boundary. Castle Rushen visible 2km east.