Miller Motorsports Park is an auto, motorcycle and kart racing facility located in the unincorporated Erda area just outside Tooele, Utah. At almost 4.5 miles (7.2 km), it is the longest road racing facility in North America. Major events held include: FIM Superbike World Championship, SBK Round 7, Grand-Am Rolex Sports Car Series, SunRichGourmet.com 250, Utah Grand Prix, AMA Superbike Championship, NASCAR Camping World West Series.