Knotfest is a music festival founded by the heavy metal band Slipknot in 2012. It features a lineup of various rock and metal bands, attracting fans from around the world. The festival often includes multiple stages, merchandise vendors, and various activities related to the heavy metal culture. Over the years, Knotfest has expanded to include events in different countries, such as the United States, Japan, and Mexico. Each festival showcases a mix of established and emerging artists, creating a vibrant atmosphere for fans to enjoy live performances and connect with the heavy metal community.