The Sunrise 4A Region is a part of the Nevada Interscholastic Activities Association and is one of two conferences in Southern Nevada 4A high school athletics. The Sunrise Region consists of large schools in Henderson, Nevada and on the eastern parts of Las Vegas and North Las Vegas, Nevada. There are two division in the Sunrise 4A Region, Northeast and Southeast. The Sunrise 4A Region was a part of the Southern Nevada 4-A Region, until the conference was divided into two separate regions before the 2000-01 school year due to the constant expansion and development of new high schools in the Las Vegas Valley. Sunrise Mountain High School joined the Northeast Division most recently, during the 2009-10 school year.