Which circuit is the longest ever used in a Formula 1 World Championship Grand Prix?

The Pescara Circuit is the longest circuit ever used for a Formula 1 World Championship Grand Prix.

Located near Pescara on Italy’s Adriatic coast, the track was a fearsome public-road course measuring about 25.6 kilometres per lap. Its layout combined fast straights with narrow, uneven countryside roads and demanding corners, making it dramatically longer than modern Formula 1 circuits.

Pescara hosted its only World Championship Formula 1 race on 18 August 1957. Stirling Moss won the race for Vanwall, while Juan Manuel Fangio took pole position. Ferrari did not enter, partly because the circuit was considered exceptionally dangerous. The race covered 18 laps, producing a total distance of more than 460 kilometres.

A common mix-up is the Nürburgring Nordschleife, which measured about 22.8 kilometres when used for Formula 1. It was famously lengthy and dangerous, but Pescara was still longer. The Pescara Circuit later disappeared from major racing because its public-road layout could not meet improving safety standards.