Mt Baldy Road
Built: 1949 and 1954
Location: On Mount Baldy Road approximately two miles north of the Mt Baldy Road and Mountain Avenue intersection
Two tunnels were needed along this roadway to bypass a rather treacherous section of roadway along the canyon bottom.
Shoemaker Canyon Road
Built: 1961 and 1964
Location: On an abandoned portion of Shoemaker Canyon Road a couple miles north of East Fork Road.
Construction on these tunnels was never completed due to budget cuts and environmental concerns regarding the roadway itself. These tunnels would have been the first two of, most likely, many more along a roadway that was planned to connect with State 2 (Angeles Crest Highway) and serve as an additional route north from the San Gabriel Valley.
Location: Approximately one mile west of the State 39 (San Gabriel Canyon Road) junction
Construction of this pair of tunnels was begun in late 1940 but was delayed due to WWII. They provide a much easier path for the highway through two large rocky ridges instead of a rockslide-prone route around.
Location: Near Hidden Springs Picnic Area on Angeles Forest Highway
This tunnel follows a rather spectacular concrete arch bridge that was built at the same time. It also marks a change in direction for Angeles Forest Highway as it transitions from a cliffside roadway to following the canyon bottom for a few miles.
Built: 1938 and modified in 1953
Location: Approximately one mile west of Agua Dulce Canyon Road
This tunnel has been used as a movie location a few times, most notably “It’s a Mad Mad Mad World” in 1963 and “Duel” in 1971. A fault line, known as the Pole Canyon Fault, is visible above the west face of the tunnel.