Sebring International Raceway
Florida, USA
Twelve hours of bumps — concrete seams, fading light, the most punishing surface in racing.
ProvisionalA Former WWII Airbase.
Sebring International Raceway is laid out over the runways and taxiways of Hendricks Army Airfield, a WWII B-17 training base, on the edge of Sebring in Highlands County, central Florida. The Grand Prix configuration — 6.019 kilometres, 17 turns, run clockwise — is essentially flat, but the airfield concrete has aged into a famously rough, seam-riddled surface where asphalt patches meet decades-old concrete slabs. It is widely considered the most punishing surface in American road racing, and drivers talk about surviving Sebring as much as they talk about winning it.
Concrete, Seams, Speed.
Turn 17 is the defining corner: a long, high-speed, bump-riddled right-hander onto the front straight where a late apex decides exit speed. The Hairpin (Turn 7) is a tight, slow-speed corner demanding heavy braking, reprofiled in 1997 when the original hairpin was removed for lack of run-off. The Green Park Chicane, added in 1967 in place of the old Webster Turn, breaks up the run between the hairpin and the top of the lap — three very different characters within the same seventeen turns.
Earned, Not Given.
Run on the concrete and tarmac of a former WWII airbase since 1950, Sebring is one of the oldest road courses in America and the most punishing surface in the sport. Its twelve-hour classic has broken cars and made legends for seventy years. To survive a lap of Sebring is to earn it — exactly the kind of history a real championship should pass through.
Day Into Dusk.
The endurance classic reimagined as a bespoke day-into-dusk run, with hospitality trackside at the hairpin and the famous Airstream paddock alive into the night.
Endurance Racing Since 1950.
Sebring opened on December 31, 1950 with the Sam Collier 6 Hour Memorial. The 12 Hours of Sebring followed in March 1952 and is now one of the oldest sports car endurance races in North America, run every spring as one of the IMSA WeatherTech SportsCar Championship's marquee endurance rounds. The circuit also hosted the 1959 United States Grand Prix — its only Formula 1 championship race — and the FIA World Endurance Championship's 1000 Miles of Sebring in 2019 and 2022–23. Few circuits anywhere carry as much endurance-racing history on one surface.
The Founding Class Is Open — Once.
This circuit is one stop on the long bet. The members who build it now write the first chapter.