Sunlight Supply Amphitheater, formerly known as the Sleep Country Amphitheater and Amphitheater Northwest is an 18,000-seat capacity amphitheater, located in Ridgefield, Washington.It is the largest outdoor amphitheater in the Portland metropolitan area. It is used for concerts, stage shows and other special events, including the Clark County Fair. Construction started in 2002, with Sustaita Architects designing the venue and Hoffman Construction Company building it.Since its opening in 2003, it has operated at a $1 million to $3 million loss through 2008. On July 10, 2009, Coldplay became the first music act to sell out the venue. The Amphitheater at Clark County was renamed Sleep Country Amphitheater in March 2010 after the parent company of Sleep Country USA acquired the naming rights, initially for three years. That contract having expired, the facility was renamed Amphitheater Northwest in January 2015. This name ended up being temporary, as the venue's owners were reported to be seeking a new sponsor. In October, they did so, and the place was renamed Sunlight Supply Amphitheater.