Which organization is known for hosting the annual NYC Marathon?

The New York Road Runners (NYRR) is the organization renowned for hosting the annual NYC Marathon. This event, which has gained international recognition, typically takes place in early November and attracts thousands of runners from all around the world. The NYRR is deeply involved in promoting running and fitness within the community, organizing numerous races throughout the year, including shorter races and training programs, thus making them integral to the culture of running in New York City.

While other organizations listed may be involved in athletic events or support sports in various capacities, none of them have the same specific role in the administration and organization of the NYC Marathon as the NYRR. The Central Park Conservancy focuses on the preservation and maintenance of Central Park and doesn’t host running events, the New York Sports Club is more about gym facilities than marathon organization, and the Empire State Building Run-Up is a distinct event centered on a specific vertical run. Each of these organizations has its own focus, which differentiates them from the NYRR's commitment to long-distance running events like the marathon.