The northern half of California has quite a few tunnels. Most were constructed before 1950, with the newest tunnel being an addition to an existing set in 2013. These pages will cover all the tunnels on any roadway throughout the region sorted by mountain range and area.
Identification key for State Highway structures
State 70 / Butte / 47.15 / 12-0109 / 1937
Route / County / Postmile / Structure Number / Year Constructed or Modified
San Francisco Bay Area
State Highways:
- Caldecott Tunnels (State 24)
- Yerba Buena Island Tunnel (I-80)
- Presidio Tunnel (State 1)
- Devils Slide Tunnel (State 1)
- Waldo Tunnel (US 101 / State 1)
- Alameda Tubes (State 260)
Local Roads:
- Broadway Tunnel (San Francisco) – 1952
- Stockton Street Tunnel (San Francisco) – 1912
- Geary Blvd Tunnel (San Francisco) – 1973
- Sutter-Solano Tunnel (Berkeley) – 1930
- 11th St Tunnel (Oakland) – 1965
- Dornan Dr Tunnel (Richmond) – 1912
- Barry-Baker Tunnel (Marin County)
Sierra Nevada Mountains:
State Highways:
- Elephant Butte Tunnel: State 70 /
- Arch Rock Tunnel: State 70 / Butte / 47.15 / 12-0109 / 1937
- Grizzly Dome Tunnel: State 70 / Plumas / 00.73 / 09-0001 / 1936
Local Roads:
- Newcastle Tunnel – Taylor Road (Newcastle) – 1932
- Old State Highway Tunnel – (Newcastle) – 1910
- Wawona Tunnel – Wawona Road (Yosemite National Park)
Klamath Mountains:
- Collier Tunnel (US 97)