 Configuration for automobile racing  Configuration for motorcycle racing | |
| Location | Assen, Netherlands |
|---|---|
| Time zone | CET (UTC+1) CEST (DST) |
| Coordinates | 52°57′42″N 6°31′24″E / 52.96167°N 6.52333°E |
| Capacity | 110,000 |
| FIA Grade | 2 |
| Owner | Stichting Circuit van Drenthe |
| Opened | 11 July 1925 (Van Drenthe street circuit) 16 July 1955 (modern circuit) |
| Closed | 1954 (for street circuit) |
| Major events | Current: Grand Prix motorcycle racing Dutch TT (1949–2019, 2021–present) World SBK (1992–2019, 2021–present) Sidecar World Championship (1955–2003, 2005–2008, 2013–2019, 2021–present) Supercar Challenge (2001–present) Future: BSB (2012–2019, 2025) Former: FIM EWC (1979–1980, 1995–1996, 2003–2006) MXGP (2015–2018) DTM (2019–2021) ETRC (2004–2005, 2009) ADAC GT Masters (2008–2011) Superleague Formula (2010–2011) Champ Car World Series (2007) |
| Website | http://www.tt-assen.com/ |
| Grand Prix Circuit (2006–present) | |
| Length | 4.555 km (2.831 miles) |
| Turns | 18 (12 right, 6 left) |
| Race lap record | 1:17.109 (Ingo Gerstl, Toro Rosso STR1, 2023, F1) |
| Motorcycle Circuit (2010–present) | |
| Length | 4.542 km (2.822 miles) |
| Turns | 18 (12 right, 6 left) |
| Race lap record | 1:31.866 (Francesco Bagnaia, Ducati Desmosedici GP24, 2024, MotoGP) |
| Grand Prix Circuit (2005) | |
| Length | 5.997 km (3.726 miles) |
| Turns | 25 |
| Race lap record | 2:00.991 (Valentino Rossi, Yamaha YZR-M1, 2005, MotoGP) |
| National Circuit (2005) | |
| Length | 3.851 km (2.393 miles) |
| Turns | 16 |
| Race lap record | 1:18.602 (Martin Hippe, Dallara F303, 2005, F3) |
| Grand Prix Circuit (2002–2004) | |
| Length | 6.027 km (3.745 miles) |
| Turns | 26 |
| Race lap record | 1:59.472 (Valentino Rossi, Yamaha YZR-M1, 2004, MotoGP) |
| National Circuit (2002–2004) | |
| Length | 3.904 km (2.426 miles) |
| Turns | 17 |
| Race lap record | 1:15.928 (Thomas Holzer, Dallara F302, 2004, F3) |
| Grand Prix Circuit (1984–2001) | |
| Length | 6.049 km (3.759 miles) |
| Turns | 26 |
| Race lap record | 2:02.471 (Tadayuki Okada, Honda NSR500, 1999, 500cc) |
| National Circuit (1981–2001) | |
| Length | 3.919 km (2.435 miles) |
| Turns | 17 |
| Race lap record | 1:23.110 (Raymond Roche, Ducati 888 SBK, 1992, World SBK) |
| Grand Prix Circuit (1981–1983) | |
| Length | 7.685 km (4.775 miles) |
| Race lap record | 2:47.470 (Kenny Roberts, Yamaha YZR500, 1983, 500cc) |
| Grand Prix Circuit (1976–1980) | |
| Length | 7.717 km (4.796 miles) |
| Race lap record | 2:54.500 (Virginio Ferrari, Suzuki RG 500, 1979, 500cc) |
| Grand Prix Circuit (1955–1975) | |
| Length | 7.700 km (4.785 miles) |
| Van Drenthe Circuit (1926–1954) | |
| Length | 16.536 km (10.275 miles) |
| Original Circuit (1925) | |
| Length | 28.400 km (17.650 miles) |
The TT Circuit Assen is a motorsport race track built in 1955 and located in Assen, Netherlands. Host of the Dutch TT, it is popularly referred to as "The Cathedral of Speed" by motorcycle racing fans. The venue has the distinction of holding the most Grand Prix motorcycle races every year (except 2020) since the series was created in 1949. It has a capacity of 110,000 spectators, including 60,000 seats. Since 1992, the circuit has also been part of the World SBK calendar except for the 2020 season.