MetraPark Arena, currently called Rimrock Auto Arena due to sponsorship, and colloquially known as The Metra, is a multi-purpose arena located at MetraPark, the fairgrounds of Billings, Montana, USA. The arena has capacity for an audience of 12,000. The arena hosts a variety of local sporting, musical, and other events. It has also hosted professional sporting competitions. In 2005, MetraPark Arena marked its 30th anniversary. The arena was renovated in 2010 and 2011 at a cost of $27 million.