Part of the stage road is also a Historic-Cultural Monument of Ventura County and of the City of Los Angeles under the name Old Stagecoach Trail.

To compensate, the government contracted the Butterfield Company to carry mail between Los Angeles and San Francisco via the new wagon road over the Santa Susana Pass.

[2][5] The precipitous portion of the route on the San Fernando Valley side was called the Devil's Slide; horses were usually blindfolded and chains were used to augment brakes on the steep descent.

[2][6] Hikers in the Santa Susana Pass State Historic Park can still see the deep ruts made by the wagons on the 'Devil's Slide' section.

A plaque was embedded into the sandstone rock by the Native Daughters of the Golden West in 1939, commemorating the Old Santa Susana Stage Road.