1000 km Zeltweg
ENDURANCE SPORTS CAR EVENT
1000km Zeltweg; 500km Zeltweg; 500 km Zeltweg; Zeltweg 1000km; 1000km of Zeltweg; Zeltweg 500km; 1000 km of Zeltweg
The 4 Hours of Red Bull Ring (originally known as the 500 km Zeltweg) was an endurance sports car event held near Spielberg, Austria. Originally based at the Zeltweg Airfield, the race moved to the Österreichring and was lengthened to a 1000 km distance and there it continued to be a regular event in the World Sportscar Championship until 1976.