.jpg) Northbound tunnel entrances | |
| Overview | |
|---|---|
| Location | Near Pacifica, California |
| Coordinates | 37°34′38″N 122°30′45″W / 37.5772°N 122.5125°W |
| Status | Complete |
| Route |  SR 1 (Cabrillo Highway) |
| Operation | |
| Work begun | May 6, 2005 |
| Constructed | 2005–2013 |
| Opened | March 26, 2013 |
| Owner | State of California |
| Operator | Caltrans |
| Traffic | Automotive |
| Technical | |
| Length | 4,149 ft (northbound) 4,008 ft (southbound) |
| No. of lanes | 1 per bore |
| Operating speed | 45 mph (72 km/h) |
| Highest elevation | c. 30 m (98 ft) msl |
| Lowest elevation | c. 20 m (66 ft) msl |
| Tunnel clearance | 6.8 m (22 ft) |
| Width | 9 m (30 ft) |
| Route map | |
 | |
The Tom Lantos Tunnels are two tunnels located within the coastal promontory of Montara Mountain, on the San Francisco Peninsula in California, United States, created to allow rerouting State Route 1 to avoid a portion of roadway known as Devil's Slide. They are officially named after late Congressman Tom Lantos, who was instrumental in securing funding for the project, but de facto named after their location.
The Devil's Slide tunnels, as they are usually called, are the second and third longest road tunnels in California at 4,149 ft (1,265 m) northbound, and 4,008 ft (1,222 m) southbound. By comparison the longest road tunnel currently in California, the Wawona Tunnel on Highway 41 in Yosemite National Park, is 4,233 ft (1,290 m).