page_title: Twin Peaks Tunnel
section_title: History
hierarchical_section_title: Twin Peaks Tunnel / History
caption_attribution_description: English: Illustration of Twin Peaks and tunnel cutaway. Signed "A.R. Hunt". Published in San Francisco Call, August 20, 1910.
context_page_description: The Twin Peaks Tunnel is a 2.27-mile long light rail/streetcar tunnel in San Francisco, California. The tunnel runs under Twin Peaks and is used by the M Ocean View/T Third Street and S Shuttle lines of the Muni Metro system.
  The eastern entrance to the tunnel is located near the intersection of Market and Castro streets in the Castro neighborhood, and the western entrance is located at West Portal Avenue and Ulloa Street in the West Portal neighborhood. There are two stations along the tunnel, Forest Hill near the western end, and the now disused Eureka Valley near the eastern end.
context_section_description: Plans for a tunnel extending from Market Street under Twin Peaks were first presented at the Merchants' Association banquet in May 1909; A. W. Scott Jr. spoke on the need for the tunnel to open up the western part of San Francisco to development, as "40,000 San Franciscans lived across the bay or in San Mateo county because of the lack of proper transportation in this city." In April 1910, a committee named the Twin Peaks Convention was formed to plan the project, which would open the development of approximately one quarter of San Francisco's land area.
caption: August 1910 conceptual cutaway rendering of tunnel
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