San Dimas, CA

San Dimas took shape when the Santa Fe Railroad reached the settlement then called Mud Springs in 1887. The San Jose Ranch Company laid out streets and lots beside the line, and citrus became the principal crop. Packinghouses sent oranges and other fruit east by rail until groves increasingly gave way to postwar housing. The Queen Anne Walker House records both the ambition and uncertainty of the first boom. Built in 1887 as the San Dimas Hotel, it attracted fewer rail travelers than expected and became James Walker's family home in 1889. Six generations of the Walker family lived there for roughly 90 years. The former hotel now holds a restaurant and community uses near the historic town center. The city's northern edge meets the San Gabriel Mountains, and equestrian routes remain a distinctive part of its recreation network.

ATTRRon Reiring / CC BY 2.0

About 27 miles of horse trails carry forward part of the ranching landscape that preceded suburban growth. South of the historic center, Frank G. Bonelli Regional Park surrounds Puddingstone Reservoir. The 1,800-acre county park includes a 250-acre lake used for boating, fishing, and seasonal swimming, along with multi-use trails and an equestrian center. These sites give the city two forms of outdoor access: foothill routes extending toward canyon country and a large reservoir park embedded among San Gabriel Valley communities. The horse trails are especially unusual in a city whose rail corridor and postwar subdivisions mark successive periods of development. San Dimas' Town Core remains compact, with historic houses, churches, small businesses, and civic buildings gathered around a short main street.

ATTRSan Dimas Nurseries; Teague, R. M; R.M. Teague (Firm); Henry G. Gilbert Nursery and Seed Trade Catalog Collection / No restrictions

Employment is more dispersed than that center. A 2020 city snapshot placed large education, utility, medical, manufacturing, data-processing, retail, and entertainment employers across San Dimas; examples included Bonita Unified School District, Southern California Gas, San Dimas Community Hospital, Gilead Sciences, and ADP Tax Services. In the Town Core, design standards adopted in 1993 guide changes to the historic district. The completed Downtown Specific Plan governs future housing, stores, workplaces, and hotels near transit, while much of that development remains prospective. Current events use established sites: the 2026 Music in the Park series meets at the Civic Center, and Cars and Coffee gatherings use the Walker House. Passenger rail returned on September 19, 2025, when Metro opened the A Line extension through San Dimas to Pomona.

ATTRUnknown author Unknown author / Public domain

The station stands east of San Dimas Avenue in the freight-rail corridor, with light rail and freight on separate tracks. Passengers reach the platform through a pedestrian underpass, while a bridge carries San Dimas Avenue over the rails. Metro's timetable effective June 7, 2026, lists station parking and connections to Foothill Transit routes 295 and 492. The A Line runs west through the San Gabriel Valley into Los Angeles County's larger transit network, making the downtown plan's transit-oriented rules relevant to future proposals. San Dimas was first plotted around a railway in 1887; nearly 140 years later, passenger trains again stop near the rail-era center and the hotel built for the original land boom.