The 4 Hours of Monza was an endurance race for sports cars held at Monza Circuit in Monza, Italy.
The 4 Hours of Monza was added to the European Le Mans Series (ELMS) calendar for the first time in 2017, replacing the previous Italian race at Imola Circuit. The last time the ELMS ran at Monza was in 2008, as part of the Le Mans Series as the 1000 km of Monza.
The inaugural event was won by Memo Rojas, Léo Roussel and Ryo Hirakawa driving for G-Drive Racing. G-Drive claimed top honors the following two years with five different drivers, only Roman Rusinov repeating as winner in both races. The 2019 edition was the first victory for the rebanded Oreca 07, Aurus 01.
The 2020 race was dominated by United Autosports drivers Filipe Albuquerque and Phil Hanson, who also claimed the ELMS title at this round. Panis Racing took its first victory in the ELMS at the 2021 edition with James Allen, Julien Canal and Will Stevens. The most recent edition in 2022 saw IDEC Sport take top spoils for the first time in three years with Paul-Loup Chatin, Paul Lafargue and Patrick Pilet, overcoming a 20 second penalty.