The Guadalajara light rail system (Spanish: Tren ligero de Guadalajara), which is operated by SITEUR (Sistema de Tren Eléctrico Urbano, Spanish for Urban Electrical Train System), is a light rail system serving the municipalities of Guadalajara, Zapopan and Tlaquepaque, in the state of Jalisco, Mexico. It is owned by the state of Jalisco, and operator SITEUR is a state authority.