River Ridge High School (RRHS), commonly referred to as Ridge, is an American high school located in Lacey, Washington, United States and is one of three comprehensive high schools of the North Thurston Public Schools. It was established in 1993 and named for its proximity to the geographical ridge of the Nisqually River valley. It earned its school nickname due to its location within the Hawk's Prairie area of Thurston County off Exit 111 of Interstate 5, serving students living in Mushroom Corner and Tanglewilde-Thompson Place.