The Istanbul Marathon is an annual marathon race held in Istanbul, Turkey. It is unique because it is the only marathon in the world that spans two continents, starting on the Asian side and finishing on the European side of the city. The event typically attracts thousands of participants from around the globe, including both professional athletes and amateur runners. The marathon features various race categories, including a full marathon, a 15K race, and a fun run. It usually takes place in November and showcases the city's rich history and stunning landscapes, making it a popular event for both runners and spectators alike.