Thank you for stopping by. Waldo Tunnel is the unofficial name of a tunnel on U.S. Route 101 between the Golden Gate Bridge and Sausalito. Waldo Point is named after William Waldo, who ran unsuccessfully as a Whig candidate for governor of California in 1853. The first bore of the tunnel was completed in 1937 and the second in 1954. The archways at the ends of the bores were painted in rainbows by a Caltrans employee, Robert Halligan, and for this reason the tunnel is occasionally referred to as the Rainbow Tunnel. As San Francisco and the Golden Gate Bridge are hidden from the northern approach of Route 101 by hills, it is likely that some portion of visitors receive their first view of the city and the bridge upon exiting the tunnel's southbound bore.(see bumper to bumper photography) The tunnel is featured in the Clint Eastwood film Dirty Harry and the Humphrey Bogart film Dark Passage. The honking of horns in the tunnel, often done deliberately for the sake of hearing the echoes, was the inspiration for harmonicist Bruce "Creeper" Kurnow's composition Honk If You Love Harmonica. In the film Bicentennial Man, a futuristic view of a relocated U.S. 101 Highway is used which bypasses the historic Waldo Grade.