Oro Valley, Arizona is a town located in the northern part of the state. It is situated in the Santa Catalina Mountains and is known for its scenic views and outdoor activities. The town was incorporated in 1974 and has grown to become one of the most populous towns in the state. ORO Valley is home to many businesses, parks, and recreational areas. It is also home to the University of Arizona's Biosphere 2, a research facility dedicated to studying the environment.