The Twin Peaks Tunnel is a 2.27-mile-long (3.65 km) light rail/streetcar tunnel in San Francisco, California. The tunnel runs under Twin Peaks and is used by the K Ingleside, L Taraval, M Ocean View and S Shuttle lines of the Muni Metro system.
Twin Peaks Tunnel at Forest Hill station
The (now replaced) east portal of the Twin Peaks Tunnel in February 1967.
Profile of Twin Peaks Tunnel, showing excavation progress as of 1916
Route of Twin Peaks Tunnel, 1916
San Francisco, officially the City and County of San Francisco, is a commercial, financial, and cultural center in Northern California. With a population of 808,437 residents as of 2022, San Francisco is the fourth most populous city in the U.S. state of California. The city covers a land area of 46.9 square miles at the end of the San Francisco Peninsula, making it the second-most densely populated large U.S. city after New York City and the fifth-most densely populated U.S. county, behind only four New York City boroughs. Among the 92 U.S. cities proper with over 250,000 residents, San Francisco is ranked first by per capita income and sixth by aggregate income as of 2022.
Image: San Francisco from the Marin Headlands in August 2022
Image: Palace of Fine Arts (16794p)
Image: Alcatraz 2021
Image: The Embarcadero, San Francisco
