Monza21 allows runners to use the Monza motor-racing circuit in Lombardy, the same track used for the Formula 1 Italian Grand Prix. It is held in October, avoiding the peak of the Italian summer heat, and offers four on-road distances: 5 km, 10 km, half marathon, and 30 km. The event welcomes families, catering not only to serious half-marathon runners but also providing shorter options suitable for newer participants or those running with friends and relatives.
The course is rolling and fast, presenting a realistic target for personal bests for well-trained runners who pace themselves correctly. The start and finish straight feels longer when experienced firsthand than it appears on television, adding to the enjoyment of running on a venue designed for racing cars instead of road races. Aid stations are positioned along the route like pit stops, supplying runners with water, fuel, and a brief respite before they rejoin the circuit. Monza also serves as a convenient base for exploring Lombardy: Milan is approximately 45 minutes away, featuring the Duomo and Galleria Vittorio Emanuele II, while Bergamo and Sirmione offer additional nearby destinations for runners before or after race day.