The Mezza Maratona dei Castelli Romani is a 21.097 km half marathon held in Castel Gandolfo, located near Rome within the Castelli Romani region. The race commences at 09:00, with its course focused around Lake Castel Gandolfo. The surrounding Alban Hills provide a distinct atmosphere compared to a typical city road race.
The route is presented as a run through the hills and lakes of the Castelli Romani, meaning the setting is as significant to its appeal as the race distance. It is suitable for runners seeking a traditional half marathon distance in a smaller Italian setting, rather than a large metropolitan event.