Circuito de Jerez (Circuit of Jerez), formerly known as Circuito Permanente de Jerez, is a 4,428 m (2.752-mile) racing circuit located close to the city of Jerez de la Frontera, deep within the sherry-producing south of Spain. The project was led by the Spanish engineer Manuel Medina Lara, based on a preliminary idea from Alessandro Rocci.
The circuit opened on 8 December 1985. During 1986 the circuit hosted the first international motorcycle event in Spain in March and the Formula One Spanish Grand Prix in April. The circuit's relatively remote location hindered significant spectator turnout, although up to 125,000 can be accommodated. Because of this, F1 moved to Barcelona following the 1991 race.
Thanks to Juan Baquero Alonso, Check out this link for the full post.