The Berlin Marathon is a marathon event held annually on the streets of Berlin, Germany on the last weekend of September. Held annually since 1974, the event includes multiple races over the marathon distance of 42.195 kilometres (26.219 mi), including elite level road running competitions for men and women, a race for the public, an inline skating race, a wheelchair race, and a handcycle race.

The marathon is a long-distance foot race with a distance of 42.195 km, usually run as a road race, but the distance can be covered on trail routes. The marathon can be completed by running or with a run/walk strategy. There are also wheelchair divisions. More than 800 marathons are held throughout the world each year, with the vast majority of competitors being recreational athletes, as larger marathons can have tens of thousands of participants.