United States > California > Los Angeles County > NorwalkAerial view of Excelsior Union High School, located at 15711 Pioneer Blvd. in Norwalk view is looking north. Pioneer Blvd. is vertically at right Alondra Blvd. is horizontally at lower middle (in front of the school) Barnwall St. is horizontally at upper middle Excelsior Drive is horizontally at top, with Gerdes Park just behind it and Maidstone Ave. is diagonally from middle left to top center (left of football field). Excelsior Union High School cornerstone was laid 1923. Photograph dated April 12, 1960.