Deer Trail is located in San Francisquito Canyon near Santa Clarita. The Los Angeles Aqueduct transports water through the canyon. Two hydroelectric power plants have been producing electricity for Los Angeles since 1917. On March 12th, 1928, the canyon experienced a terrible tragedy when the St. Francis Dam collapsed, claiming the lives of over 400 people. The tragedy is the second-greatest loss of life in California's history, following the 1906 San Francisco Earthquake. The site of the disaster is registered as California Historical Landmark #919. The landmark is located on the grounds of Powerhouse No. 2 near the trail's east end.
The point-to-point trail is accessible from the West via City Highline Road and from the East via Del Sur Ridge. It consists of rough dirt and gravel, with several washed-out areas and exposed rock. A series of moderate hill climbs and descents require high clearance and 4WD. While the trail is rated as a black diamond, it's a relatively easy ride if you pay attention and choose appropriate lines. There is no camping on this trail.