Which event is the major annual gathering for bikers in South Dakota?

The Sturgis Rally is recognized as the major annual gathering for bikers in South Dakota, attracting hundreds of thousands of motorcycle enthusiasts from around the country and beyond. This event, officially known as the Sturgis Motorcycle Rally, has been held annually since 1938 in the small town of Sturgis, which becomes a bustling hub for biker culture during the rally. Throughout its duration, the rally features a variety of activities including motorcycle races, concerts, and showcases of custom motorcycles, making it a significant cultural event within the biking community. The sheer size and longevity of this rally set it apart from other events, making it not only a local phenomenon but also a notable occurrence on the national and international calendar for bikers.