Bristol Motor Speedway is one of the smallest ovals on the NASCAR circuit. Having been built in 1960, and hosting the first race in 1961, it celebrated 50 years in 2011. The main change occurred at the circuit in the 1990's when the surface changed from tarmac to concrete. Today this is perhaps the most famous part of Bristol Motor Speedway and adds to the unique experience of such a small circuit. The short length of the circuit also means that speeds are much lower than at other ovals, and excitement is always high as 40+ cars on a 0.5 mile circuit provides a lot of overtaking!