In 1991, Ayrton Senna won the Brazilian Grand Prix at Interlagos in torrential rain. By the final laps, his McLaren had lost sixth gear, the car was stuck in whatever gear it could find, and Senna was driving with one hand while the other pressed the gearlever into place. When he crossed the line, he stopped on the infield, climbed out, and collapsed. The crowd — tens of thousands of Brazilians — erupted in a noise that those who were present still describe as the most emotional sound they have ever heard at a race track.
That moment captures what Interlagos means to Formula 1: a circuit where the sporting result and the emotional reaction are inseparable, where the crowd is not merely an audience but a participant, and where the anti-clockwise layout, the elevation changes, and the unpredictable São Paulo weather combine to produce drama that no other venue can replicate.
The original circuit: 7.9 kilometres of speed
The Interlagos circuit was built in 1940 by a group of São Paulo businessmen, with the layout designed by Wilson Fittipaldi Sr. — father of two-time world champion Emerson Fittipaldi. The original circuit was 7.9 kilometres long, featuring a series of fast, flowing corners on a plot of land between two lakes (Interlagos means "between the lakes" in Portuguese).
The original layout was genuinely fast and genuinely dangerous. The long back straight allowed enormous speeds, and the high-speed corners that connected it to the rest of the lap offered little margin for error. By the time Formula 1 arrived in 1972, the safety concerns were already significant, and the circuit was eventually shortened and reprofiled in 1990 to meet modern standards.
Senna and the home crowd
Interlagos is inextricable from the story of Ayrton Senna. Although Senna's home race was not always at Interlagos — the Brazilian Grand Prix moved between venues in the 1970s and 1980s — the circuit became the natural home of Brazilian F1 fandom after its return to the calendar in 1990.
Senna's 1991 victory remains the defining moment. The rain fell throughout the race, and Senna's car was deteriorating with every lap. By the end, he was driving with sheer willpower, his body exhausted, his car barely functional. When he finally stopped, he needed medical attention. But the victory — his first at home — meant more than any other result in his career. The image of Senna, exhausted and emotional, standing on the podium while the Brazilian anthem played, is one of the most iconic in Formula 1 history.
After Senna's death in 1994, the circuit was officially renamed the Autódromo José Carlos Pace — after the Brazilian driver who won the 1975 Brazilian Grand Prix and was killed in a plane crash in 1977. The name change was a tribute to Pace, but the emotional connection to Senna remains the defining feature of Interlagos for most fans.
The modern layout: anti-clockwise and demanding
The modern Interlagos circuit is 4.309 kilometres long, with a layout that is unusual in two significant ways. First, it runs anti-clockwise — the opposite direction to most circuits on the calendar. This places unusual loads on the drivers' necks, which are conditioned for clockwise circuits where the right side does most of the work. At Interlagos, the left side of the neck takes the strain, and drivers often report significant fatigue by the end of the race.
Second, the circuit features substantial elevation changes. The Senna S — the fast left-right-left combination at the top of the first sector — is approached uphill, while the Descida do Lago that follows is a long downhill right-hander where the car is light on the brakes and the rear is nervous. The combination of elevation change, anti-clockwise direction, and high-speed corners makes Interlagos one of the most physically demanding circuits on the calendar.
Why Interlagos produces championship drama
Interlagos has hosted more dramatic championship moments than almost any other circuit. The 2008 Brazilian Grand Prix — where Lewis Hamilton won the championship by passing Timo Glock on the final corner of the final lap — is the most famous season finale in Formula 1 history. The 2012 race, where Sebastian Vettel clinched his third title after a chaotic wet-dry race, is another.
The circuit's contribution to this drama is not accidental. The São Paulo weather is unpredictable — rain can arrive suddenly and affect only part of the circuit. The long main straight creates overtaking opportunities that can change positions quickly. And the anti-clockwise layout, combined with the elevation changes, punishes mistakes more severely than flatter, more forgiving circuits.
The future
Interlagos remains on the Formula 1 calendar under a contract that extends through the late 2020s. The circuit has invested in facility upgrades in recent years, and the race has been rebranded as the São Paulo Grand Prix. But the fundamental character — a demanding, anti-clockwise circuit with passionate fans and unpredictable weather — remains unchanged. As long as Formula 1 races at Interlagos, it will continue to produce the kind of drama that no other venue can replicate.