DUI Attorney in San Dimas

Reviewed by Ron Chini, Esq. · CA State Bar No. 263308 · DUI defense attorney in Irvine, CA since 2009.
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How DUIs are policed in San Dimas

San Dimas does not run its own municipal police department. The city contracts with the Los Angeles County Sheriff's Department, which patrols San Dimas out of the San Dimas Sheriff's Station at 270 S. Walnut Avenue — the same station that also covers the nearby unincorporated communities of Charter Oak, Via Verde, and parts of Puente Hills/Angeles National Forest. A deputy working a late-night DUI patrol inside city limits, or a sergeant reviewing a field sobriety report, is a County Sheriff's employee, not a separate city police officer.

Freeway DUI stops are a different story. San Dimas sits directly on the SR-57 / I-210 interchange, and the Kellogg Interchange — where I-10, SR-57, and SR-71 all meet — sits right on the San Dimas/Pomona boundary. DUI enforcement on those freeway segments, including any CHP saturation patrols through the corridor, is typically handled by the CHP Baldwin Park Area office, which covers I-10, I-605, I-210, SR-60, SR-57, SR-71, and SR-39 across the East San Gabriel Valley.

• Surface-street DUI stop in San Dimas → LA County Sheriff's Department, San Dimas Station
• Freeway DUI stop on SR-57, I-210, or near the Kellogg Interchange → CHP, Baldwin Park Area office
• Either way, the case is filed and arraigned at the same courthouse — Pomona

Where a San Dimas DUI case is heard

Regardless of which agency makes the stop, a San Dimas DUI arrest is generally filed with the Pomona Courthouse, 400 Civic Center Plaza. A direct courthouse-coverage directory confirms Pomona Courthouse South serves "Pomona, La Verne, San Dimas, Diamond Bar, and surrounding communities." Some sources describe an older two-building arrangement with a separate North building, but whether that building is still taking filings isn't confirmed — your notice to appear or arraignment paperwork is the authoritative source on which building and department actually has your case, not this page.

Booking and getting a car back after a San Dimas arrest

A San Dimas DUI arrest is typically booked at the San Dimas Sheriff's Station jail, 270 S. Walnut Avenue — the same station that patrols the city. The station jail is a short-term holding facility: by the Sheriff's Department's own booking standard, people are held there no more than 48 hours (excluding weekends and holidays) before they are released, bailed out, or transferred further into LA County custody. General visiting is limited to one 30-minute window daily (4:00–7:00 p.m.); booking intake includes three free phone calls. If your vehicle was towed under a DUI-related impound, the tow yard and release process will be listed on your citation or by calling the station directly.

San Dimas: the 57/210 corridor, Raging Waters, and Western Days

San Dimas incorporated on August 4, 1960, becoming the 70th city in Los Angeles County, after decades as a citrus-growing town that traces back to the 1837 Rancho San Jose land grant. That citrus and ranching heritage is still visible today: the city's 1889 Walker House — built by citrus pioneers James W. and Sue Walker — now serves as the home of the San Dimas Historical Society, and San Dimas still hosts an annual Western Days celebration and fall rodeo tied to its equestrian trails. San Dimas is also home to Raging Waters Los Angeles, California's largest water park, which opened in 1983 — a major summer draw that brings heavy evening and weekend traffic (and corresponding DUI enforcement attention) through the city, especially along Raging Waters Drive near the SR-57/I-210 interchange. San Dimas also has a lighter claim to fame: it's the fictional hometown in Bill & Ted's Excellent Adventure (1989) — though the film itself was actually shot in Arizona.

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Ron Chini, Esq.

DUI Defense Attorney · CA State Bar No. 263308

Ron defends DUI cases across Southern California from his Irvine office, in English and Farsi — and works directly with you, not a call center.

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