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The San Joaquins is a state-supported passenger train service operated by Amtrak in California's San Joaquin Valley. As of 2025, the service operates seven daily round trips between its southern terminus at Bakersfield and Stockton. Of these, five continue to Oakland and two to Sacramento. Two additional Sacramento-bound round trips are scheduled to begin in fiscal year 2025.
The service is notable for its extensive network of dedicated Amtrak Thruway bus routes, which are integral to its overall performance. More than 55% of riders use a Thruway bus for at least one segment of their journey. These routes are timed to connect with train arrivals and departures, and offer service to destinations across the state, including Southern California (notably Los Angeles Union Station, where passengers can transfer to the Pacific Surfliner or Amtrak's long-distance services), San Francisco, the Central Coast, the North Coast, the High Desert (including Las Vegas), Redding, Reno, and the Yosemite Valley.
With passengers in fiscal year 20—a change from the previous year—the San Joaquins ranked as Amtrak's seventh-busiest route nationwide and third-busiest in California.
Like other intercity rail services in California, the San Joaquins is managed by a joint powers authority: the San Joaquin Joint Powers Authority (SJJPA). Its board includes two elected representatives from each of the eight counties served by the route. The SJJPA contracts the San Joaquin Regional Rail Commission to oversee daily operations, Amtrak to operate the trains, and Transit Services America for maintenance of locomotives and passenger cars. Caltrans funds the service and owns the rolling stock.
Like the modern San Joaquins, the Santa Fe's Golden Gate service ran from Oakland to Bakersfield, with motor coach connections to Los Angeles. However, the Southern Pacific's San Joaquin Daylight continued beyond Bakersfield, directly to Los Angeles via the Tehachapi Pass and Newhall Pass mountain passes; in 1958, the complete journey took just over twelve hours — six hours, fifty-four minutes between the railroad’s Oakland 16th Street and Bakersfield depots, and a further five hours, eight minutes to Los Angeles.
In April 1965, as ridership on passenger trains continued to drop, Santa Fe received permission from the Interstate Commerce Commission to severely curtail Golden Gate operations, and the service was entirely discontinued in 1968. The Southern Pacific's San Joaquin Daylight was discontinued with the start-up of Amtrak in May 1971.
Storey station and Richmond station were added on October 30, 1977, along with a Stockton–Sacramento connecting bus. The schedule was changed on July 19, 1979, with an earlier northbound and later southbound departure, allowing single-day round trips to the Bay Area.
A third round trip was added on December 17, 1989. Two days later, southbound San Joaquin train 708 collided with a tractor-trailer rig at a crossing east of Stockton, killing the driver of the rig and two Amtrak engineers. A fourth round trip was added on October 25, 1992. On May 16, 1999, Amtrak added a Sacramento–Bakersfield round trip - the fifth daily San Joaquins service round trip. A second Sacramento–Bakersfield round trip was added on March 18, 2002, along with an infill station at .
On September 29, 2012, Governor Jerry Brown signed Assembly Bill 1779, which enabled regional government agencies to form the San Joaquin Joint Powers Authority (SJJPA) to assume administration and management of the route, while the state of California would continue to fund operations. Under the joint powers authority model, the service would be governed by a board composed of eight elected officials, appointed by an agency in each of the counties the train travels through. The governance structure was modeled after the Capitol Corridor Joint Powers Authority, which has been operating the Capitol Corridor regional train in Northern California since 1998.
The first SJJPA board meeting was held on March 22, 2013, to begin planning for the shift in control. In that time, the SJJPA board contracted with the San Joaquin Regional Rail Commission to provide day-to-day management of the service and contracted with Amtrak to continue to operate the service and maintain the rolling stock (locomotives and passenger cars). Control of the San Joaquins shifted from Caltrans to the SJJPA on July 1, 2015.
A fifth Oakland–Bakersfield round trip was added to the service on June 20, 2016, the first expansion of the service in more than 14 years.
Two years later, the SJJPA established an early-morning "Morning Express Service" between Fresno and Sacramento, allowing same-day trips to the state capitol for the first time, was expected to result in increased ridership from business travelers. The change was criticized by Bakersfield-area officials, because it required ending the last southbound train of the day in Fresno, reducing daily service to Bakersfield by one daily round trip. The service began on May 7, 2018, but proved to be unpopular, with ridership counts showing an average of just 50 people on the train, compared to 130 with the old timetable. The "Morning Express Service" was eliminated one year later on May 6, 2019, and trains were reverted to their previous schedule.
Sacramento service was discontinued and one round-trip to Oakland was cancelled on March 25, 2020, amid the COVID-19 pandemic. The cancelled Oakland trip was restored on June 28, 2021, and one Sacramento round trip was restored on October 18, 2021. , the SJJPA anticipates restoring the second Sacramento round-trip by Fall 2025.
As well, Oakland to Bakersfield trips take just over six hours, which requires an expensive crew change in Merced; previously, the Authority investigated terminating some trains at Emeryville, skipping stops on some trains, increasing current speeds to , and/or operational improvements like decreasing dwell times, but these proposals were later removed from the Authority's Business Plan Updates, from 2023 onward.
Under their operating agreement with Amtrak, the SJJPA is provided the rights to use the service mark "Amtrak San Joaquins" from the railroad, free of charge; the Authority considers the service mark difficult for customers to spell, and believes it limits public understanding of the scope of the services provided by the Authority. In March 2025, the Authority adopted a resolution to rebrand the San Joaquins service to the " Gold Runner".
The Stockton Diamond, a level junction in Stockton where the two San Joaquin routes diverge, was the busiest rail junction in the state by 2019. As part of the Valley Rail project, these lines will be grade separated: the north-south Union Pacific line is planned to be elevated over the BNSF line. This project is expected to finish construction in Summer 2027 (as of Dec 2024).
Two additional Sacramento round trips are planned to be added, routed over the Union Pacific Railroad Sacramento Subdivision north of Stockton and west of the present route, which uses the Fresno Subdivision north of Stockton. Unlike the 1999-initiated route, the Sacramento Subdivision has spare capacity to allow the increased service. Six new stations are planned: Lodi (distinct from the Lodi Transit Station), Elk Grove, three locations in Sacramento, and Natomas. Trains operating on the Sacramento Subdivision route will not serve the existing Sacramento Valley Station, but SacRT light rail connections and a shuttle bus to Sacramento International Airport are planned elsewhere.
When the Valley Rail project is complete, ACE will share the route to Natomas from Stockton and add an additional branch south to Ceres in 2023 with an extension to Merced in 2027. When the Natomas runs are initiated, one existing Oakland trip is planned to terminate at Stockton-Downtown, freeing a slot for a full Natomas to Bakersfield round-trip while continuing to provide five trips from the Bay Area.
The San Joaquin Joint Powers Authority will serve as the high-speed rail service provider in the Valley per a memorandum of understanding with the California High-Speed Rail Authority. Upon completion of the high-speed rail initial operating segment, trains are expected to terminate at that system's new Merced station to act as a feeder to high-speed service. A new rail link is planned to connect the BNSF and Union Pacific lines, to allow San Joaquins trains to access the new station directly.Sacramento to Merced service is thus planned to increase in frequency to hourly service.
In December 2023, the Federal Railroad Administration accepted an application by Caltrans to enter the San Joaquins route into its Corridor Identification and Development Program. Proposed improvements include additional frequencies and an extension north to Chico and Redding. The program grants $500,000 toward service planning and prioritizes the corridor for future federal funding.
In 2024, the Butte County Association of Governments released a Strategic plan, named North Valley Rail to extend The San Joaquins service to Chico. Construction is expected to commence in 2029. The SJJPA is investigating a further extension to Redding.
Longer-term proposals include extending Oakland trains to Oakland Coliseum station to provide a connection to Oakland International Airport and an additional BART connection, routing some trains via the ACE route through the Tri-Valley, and consolidating all Stockton service at either Robert J. Cabral Station, or a station east of the developing Stockton Diamond junction. The SJJPA is also working with Caltrans and the Capitol Corridor Joint Powers Authority to develop a plan to enable some San Joaquins or Capitol Corridor services to be short-turned at Martinez.
At the Stockton Diamond the routes split to Oakland or Sacramento.
The Oakland trains continue west on the Stockton Subdivision to Port Chicago. At Port Chicago they cross to the Union Pacific Railroad's Tracy Subdivision to Martinez, continue on the Martinez Subdivision to Emeryville, and finally travel a few miles on the Niles Subdivision to Oakland's Jack London Square station.
Trains to the Sacramento Valley Station diverge in Stockton and run north to Sacramento on Union Pacific's Fresno Subdivision and on the Martinez Subdivision within Sacramento.
If the tracks for the Central Valley segment of California High-Speed Rail (HSR) are completed prior to that system's full startup, there are calls for the San Joaquins trains to use the HSR infrastructure to speed up traditional rail service to 125 mph.
The route is Amtrak's seventh-busiest service in the nation and the railroad's third-busiest in the state of California.
The San Joaquins service has an extensive network of dedicated Amtrak Thruway buses. Over 55% of passengers on the route used an Amtrak Thruway bus on at least one end of their trip.
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Daily inspections, cleaning, and maintenance of equipment are conducted in Oakland, Bakersfield, and Sacramento. Heavy maintenance is performed by Transit Services America in Stockton. Previously, all maintenance took place in Oakland, but both the Capitol Corridor and San Joaquins voted to shift to a new contractor in 2023, citing the contractor's ability to adhere to high maintenance quality and cleanliness and be more agile with overhaul projects.
The San Joaquin Regional Rail Commission selected Herzog Transit Services for maintenance of cars and locomotives in 2025.
The Charger locomotives meet EPA Tier IV emission standards and are capable of operating at 125 mph in revenue service. Many of the F59PHI have been re-engined to meet more stringent EPA Tier II emission standards.
These locomotives are owned by Caltrans and carry its CDTX . Amtrak-owned locomotives are also occasionally used on the San Joaquin, including the P42DC.
Caltrans also owns several second-generation Surfliner bi-level cars that are used on some San Joaquins trainsets. The newer cars look very similar to the California Car fleet, but feature reclining seats, open overhead luggage racks, and a restroom on the upper level of each car. There are several kinds of Surfliner Cars in service on San Joaquins trains: coach cars, cab/baggage/coach cars, and café cars. These follow a similar naming convention as the California Cars, with the Surfliner cafés named for California islands, the coach cars named for beaches, and the cab cars for peninsulas, or "points".
The bi-level fleet is pooled between the San Joaquins and Capitol Corridor routes. The cars have doors which can be operated remotely on either side of the train from a single point of control. This feature allows the operator to maximize passenger flow in boarding and alighting operations, and minimize station dwell time.
Caltrans had planned to use the Comet trainsets beginning July 2013, but their refurbishment took longer than expected. The first Comet trainset entered revenue service on October 21, 2013, and the second trainset followed on April 15, 2014. The Comet sets replaced two bi-level San Joaquins consists, and the California Cars from these trainsets were then added to the remaining San Joaquins bi-level trains, as well as several Capitol Corridor trains.
Caltrans previously paid to lease three Horizon dinettes, to serve as café cars on Comet trainsets. The Horizon dinettes were returned to Amtrak, as a consequence of service cuts in response to the COVID-19 pandemic, and conductors later offered complimentary snacks and water bottles instead.
Presently, one Comet car has been added to each of the bi-level trainsets on the San Joaquins service, to meet minimum train lengths imposed by BNSF Railway — in this use, the Comet cars do not carry passengers. BNSF requires San Joaquins trains to have a minimum of 28 axles to protect against track circuit malfunctions, an issue known as "loss of shunt." When not properly mitigated, loss of shunt can interfere with the safe operation of block signaling systems, and can prevent grade crossing signals from activating.
Caltrans plans to reassign the Comet cars to services in Southern California after delivery of the Siemens Venture cars is complete. In June 2024, seven of the Comet cars entered service on the Pacific Surfliner.
Unlike the bi-level equipment, the Venture cars will be used exclusively on the San Joaquins service. Caltrans has ordered 49 cars, forming seven total trainsets of seven cars each: five coaches, a café car, and one cab-control car with passenger seating and a compartment for checked baggage. The Venture consists are semi-permanently Railway coupling trainsets, which allows for wider gangways between cars — thus providing mobility-impaired passengers access to the entire train. Like the bi-level cars, the Venture trainsets have doors that can be operated remotely on either side of the train from a single point of control. To accommodate the low-level platforms along the line, the Venture cars also have automatically deployed stair steps. These features maximize passenger flow in boarding and alighting operations, and minimize station dwell time.
Though the Venture trainsets are designed for use at high-platform stations, all stations on the San Joaquins route have low-platforms; to increase accessibility for mobility-impaired passengers, the SJJPA is exploring the modification of all stations to include two mini-high platforms. These platforms will be short lengths of high platform, each long enough for one Venture vestibule, with an accessible ramp up from the low platform; in conjunction with the mini-high platforms, Caltrans is designing a portable bridge plate to be carried aboard the cars. Additionally, the SJJPA has directed Siemens to procure electrically-operated car-borne wheelchair lifts, to replace the hand-cranked lifts currently utilized by each San Joaquins station.
The first trainset was intended to enter revenue service in 2020, though Caltrans only began accepting deliveries of the new rolling stock in late 2022, and the first set entered service on December 21, 2023. As of 2025, four trainsets — each comprising six coach cars, and either one locomotive and one leased Amtrak NPCU, or two locomotives arranged top-and-tail — rotate through revenue service on the San Joaquins; contingent on the delivery of the cab-control cars, the SJJPA anticipates all seven trainsets to be available for revenue service by mid-2026. The Authority has not yet disclosed a date for the café or cab-control equipment to enter service, though they are investigating the use of unstaffed vending machines to provide food service on their Venture sets; presently, the only food service available on Venture sets are "Snack Stations" — grab-and-go selections of complimentary snacks and beverages.
Use of NPCUs allows for push-pull service on San Joaquins trains which do not utilize California or Surfliner bi-level equipment. Previously, the three Caltrans units were used in rotation across two Comet trainsets, but in June of 2024, two were moved to Southern California with seven Comet cars, for service on the Pacific Surfliner. As of 2025, Caltrans leases an additional fourth NPCU from Amtrak, to allow two units to remain in service on the San Joaquins trains which use Siemens Venture equipment.
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