Canyon del Oro High School, also known as CDO, is a comprehensive public high school in Oro Valley, Arizona, located 6 miles (9.7 km) north of Tucson at the base of Pusch Ridge. Established as a high school in 1964, CDO is one of three high schools of Amphitheater Public Schools and serves about 1,600 students in grades 9–12. The school name originates from the remote Canyon del Oro (Spanish for Canyon of Gold) in the nearby Santa Catalina Mountains north of Tucson. The school mascot is the Dorado (from the Legend of El Dorado), a mythical Latin American warrior, and the school colors are forest green and gold. The Dorado mascot was originally designed by former art teacher Diane Redhair in the mid-1960s.