Mount Wilson Toll Road, historic trail in the San Gabriel Mountains, California, United States

Mount Wilson Toll Road is a hiking trail that climbs steeply through the San Gabriel Mountains with exposed sections, shaded forest passages, and scattered rest areas along the way. The path shows signs of its original construction with stone work and natural features that shape how hikers move through the landscape.

In June 1889 Judge Benjamin Eaton and Pasadena businessmen formed the Pasadena and Mount Wilson Toll Road Company, but it failed. Five investors reorganized, downsized the plan to a four-foot road, and by June 1891 had built a ten-mile trail; it opened that July with tolls of 25 cents for hikers and 50 cents for horseback. The company closed the road in March 1936 after the Angeles Crest Highway opened.

The road's name comes from the tolls once charged at a gate reached from Santa Anita Avenue in Altadena: 25 cents for hikers and 50 cents for horseback riders in 1891. The 1905 lease with the Carnegie Institution gave the public permanent access to the observatory, and the toll company built a hotel with cottages for overnight visitors that same year.

The climb takes several hours on a steep path, so start early and bring plenty of water and snacks for energy. The terrain is uneven and exposed to weather, so sturdy shoes and layers of clothing help with comfort.

Sections of the original route built over a century ago remain visible with stonework and structural details intact. Hikers walking the path can observe the construction techniques that were used to create mountain access in that era.