Capital High School is a three-year public secondary school in Boise, Idaho, United States. Opened in the fall of 1965, it was the third of four public high schools constructed in the Boise School District, and serves its northern portion. The other high schools are Boise (1902) in the east, Borah (1958) in the southwest, and Timberline (1998) in the southeast. The Capital High boundary includes sections of Eagle and Garden City.