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Altamont Corridor Express, or ACE, is a commuter rail service in California's San Joaquin, Alameda, and Santa Clara counties. As of 2022 [update] , the service has ten stations. [1] Additional stations, most in the Central Valley, are planned as part of several expansion projects.
| † | Terminals |
 | Transfer stations with other rail systems |
| † | Transfer stations with other rail systems/Line termini |
| Station [2] | Image | Location | Service began | Connections |
|---|---|---|---|---|
| Stockton† (Robert J. Cabral) |  | Stockton | October 19, 1998 |  Amtrak: San Joaquins  Amtrak Thruway, San Joaquin RTD |
| Lathrop/Manteca |  | Lathrop | October 19, 1998 | StanRTA |
| Tracy |  | Tracy | October 19, 1998 | Tracer |
| Vasco Road |  | Livermore | October 19, 1998 | WHEELS |
| Livermore |  | Livermore | October 19, 1998 | Amtrak Thruway, WHEELS |
| Pleasanton |  | Pleasanton | October 19, 1998 | WHEELS |
| Fremont |  | Fremont | October 19, 1998 | Amtrak: Capitol Corridor AC Transit |
| Great America |  | Santa Clara | October 19, 1998 | Amtrak: Capitol Corridor VTA light rail (at Lick Mill station): Green Line, Orange Line VTA Bus |
| Santa Clara |  | Santa Clara | 2001 [lower-alpha 1] |  Caltrain Amtrak: Capitol Corridor: VTA Bus |
| San Jose Diridon † |  | San Jose | October 19, 1998 | Caltrain Amtrak: Coast Starlight , Capitol Corridor VTA light rail: Green Line Amtrak Thruway, Greyhound, Highway 17 Express, Megabus, VTA Bus |
| Station | Location | Planned opening | Connections |
|---|---|---|---|
| Natomas/Sacramento Airport † | Sacramento | 2026 |  Sacramento International Airport (via bus connection) Amtrak: San Joaquins (planned) [3] |
| Old North Sacramento | Sacramento | 2029 | Amtrak: San Joaquins (planned) [3]  SacRT light rail (at Globe station): Blue Line RT bus |
| Midtown Sacramento | Sacramento | 2026 | Amtrak: San Joaquins (planned) [3] SacRT light rail (at 16th Street station): Blue Line, Gold Line RT bus |
| Sacramento City College | Sacramento | 2029 | Amtrak: San Joaquins (planned) [3] SacRT light rail: Blue Line RT bus |
| Elk Grove (proposed) | Elk Grove | 2026 | Amtrak: San Joaquins (planned) E-tran |
| Lodi | Lodi | 2027 | Amtrak: San Joaquins (planned) [3] |
| North Lathrop | Lathrop | 2027 | Valley Link (planned for 2028) |
| Manteca | Manteca | 2026 | Manteca Transit, StanRTA |
| Ripon | Ripon | 2027 | StanRTA |
| Modesto | Modesto | 2026 | Greyhound, StanRTA |
| Ceres † | Ceres | 2026 | StanRTA |
| Turlock | Turlock | 2029 | Turlock Transit, StanRTA |
| Livingston | Livingston | 2030 | |
| Atwater (optional) | Atwater | ||
| Merced † | Merced | 2030 |  California High-Speed Rail (planned for late 2020s) Merced County Transit |
Ceres is a city in Stanislaus County, California. Its population was 49,302 at the 2020 U.S. Census, up from 45,417 at the 2010 U.S. Census. It is part of the Modesto metropolitan statistical area.
The Altamont Corridor Express is a commuter rail service in California, connecting Stockton and San Jose during peak hours only. ACE is named for the Altamont Pass, through which it runs. Service is managed by the San Joaquin Regional Rail Commission, and operations are contracted to Herzog Transit Services. The 86-mile (138 km) route includes ten stops, with travel time about 2 hours and 12 minutes end-to-end. In 2023, the line had a ridership of 576,300, or about 3,000 per weekday as of the second quarter of 2024. ACE uses Bombardier BiLevel Coaches, MPI F40PH-3C locomotives, and Siemens Charger locomotives.
Santa Clara Transit Center is a railway station in downtown Santa Clara, California. It is served by Caltrain, Amtrak Capitol Corridor, and Altamont Corridor Express (ACE) trains. It is the planned terminus for the Silicon Valley BART extension into Santa Clara County on the future Green and Orange Lines. The former station building, constructed in 1863 by the San Francisco and San Jose Railroad, is used by the Edward Peterman Museum of Railroad History.
City College station is an at-grade light rail station on the Blue Line of the SacRT light rail system operated by the Sacramento Regional Transit District. The station is located in an exclusive right of way alongside the Union Pacific Railroad's Sacramento Subdivision and a small rail yard, on the campus of Sacramento City College, after which the station is named, in the city of Sacramento, California.
Fremont station is a train station located in the Centerville area of Fremont, California, United States. The station is served by Amtrak Capitol Corridor commuter rail/intercity rail service and the Altamont Corridor Express (ACE) commuter rail service. The station has two platforms serving the two tracks of the Niles Subdivision. Most trains use the longer west platform.
Robert J. Cabral Station, is a railway station in Stockton, California. In 2003, the station building was named in honor of the late Robert J. Cabral, a San Joaquin County supervisor instrumental in the creation of the Altamont Corridor Express (ACE), originally Altamont Commuter Express.
Modesto station is a staffed Amtrak station in Modesto, California. It serves the on the San Joaquin line. Designed by Pacific Design Associates of Modesto and VBN Architects of Oakland, the $2.4 million depot was built on four acres of former dairy pastureland. The station has one platform which serves a single track.
The Modesto Transportation Center is a bus terminal and former train station located in downtown Modesto, California.
Valley Link is a proposed 26-mile-long (42 km) commuter rail service in Northern California, which seeks to connect the rapid transit Bay Area Rapid Transit (BART) system in the San Francisco Bay Area with the northern San Joaquin Valley via the Tri-Valley region. Since 1997, BART's Blue Line's eastern terminus is at Dublin/Pleasanton station on the border of Dublin and Pleasanton. Valley Link seeks to extend rail service east from here into the northern San Joaquin Valley over Altamont Pass and to help alleviate traffic congestion and reducing greenhouse gas emissions on Interstate 580 (I-580). The project resulted from various failed proposals to extend the Blue Line east to Livermore.
Ceres station is a future Altamont Corridor Express rail station in the city of the same name. It was expected to open to revenue service in 2024 as the terminus of the first phase of ACE's expansion to Merced, but the opening was later pushed back to 2026. The station would be located between Railroad Avenue and CA 99 near the southbound Whitmore Avenue exit underpass; the platform would only accessible approaching from the east side of the tracks. A bus will connect to Merced at first, with rail service to follow in the future. Parking will be available on nearby surface streets.
Midtown Sacramento is a planned train station in the neighborhood of the same name that will be a stop on Altamont Corridor Express and Amtrak California's San Joaquin services. To be constructed as part of the Valley Rail project, it was expected to open no later than 2023. By 2023, the opening date had slipped to 2026. The platform will run between P Street and the wye at S Street and be bisected by Q Street. SacRT light rail stations are located either three blocks to the east or west.
The Manteca Transit Center is the primary public transit hub of Manteca, California. The bus station features five bus bays with Manteca Transit as the primary operator; the agency also maintain their offices at the facility. San Joaquin Regional Transit District and Altamont Corridor Express shuttle routes also serve the transit center. Modesto Area Express service began in July 2020. Altamont Corridor Express commuter rail service is expected to commence at a newly constructed platform along the Union Pacific rail line by 2026.
Ripon is a future Altamont Corridor Express station in the city of the same name. The platform will be located between the railway right of way and U.S. Highway 99, south of the Main Street interchange. Access to the platform will be via a pedestrian overcrossing southwest over the tracks to South Industrial Avenue. It was expected to open to revenue service in 2024 as a station along the first phase of ACE's expansion to Merced, but was later delayed to 2027.
North Lathrop station is a planned Altamont Corridor Express station in Lathrop, California – the second to be constructed in the city. It was expected to open to revenue service in 2023 as part of the first phase of ACE's expansion to Merced, but was later delayed to 2027.
Old North Sacramento is a planned train station that will be a stop on Altamont Corridor Express and Amtrak California's San Joaquin services. The station is located near the intersection of El Monte Avenue and Acoma Street. To be constructed as part of the Valley Rail project, it is expected to open by 2029. The SacRT light rail Globe station is located nearby to the east.
Natomas/Sacramento Airport is a planned train station that will be a stop on Altamont Corridor Express and Amtrak California's San Joaquin services. The station site is in the Natomas area, north of Sacramento, east of Blacktop Road and immediately south of West Elkhorn Boulevard. Planned as the northern terminus of the Valley Rail project, it was expected to open no later than 2023. By 2023, the opening date had been pushed back to 2026. A shuttle bus will provide connectivity for those traveling between the station and Sacramento International Airport, 8 miles (13 km) to the east.
Turlock station is a future Altamont Corridor Express station in the city of the same name. It is expected to open to revenue service in 2029 as part of the second phase of ACE's expansion to Merced. The station would be located at the intersection of Golden State Boulevard and Front Street approximately a mile from downtown. The platform is planned to be connected to the Turlock Transit Roger K. Fall Transit Center via an elevated pedestrian bridge. The station would be across a street or two from the city's Greyhound Lines bus stop.
Elk Grove station is a planned train station in Elk Grove, California to be located north of Laguna Boulevard at 3134 Dwight Road. it is part of the Valley Rail Sacramento Extension Project between Stockton and Sacramento. It will be served by Amtrak California San Joaquins and Altamont Corridor Express trains. An earlier proposal for a North Elk Grove station was rejected after the Sacramento Regional Sanitation District objected to its construction. The station is expected to open with the commencement of ACE service to Natomas in 2026. In February 2024, Mayor Bobbie Singh-Allen announced that the City of Elk Grove had closed escrow on the station property. At the same time, it was announced that the city was going through the design phase for the station.
Livingston station is a future Altamont Corridor Express station in Livingston, California. It is expected to open to revenue service in 2030 as part of the second phase of ACE's expansion to Merced. The station is located on Main Street. Turlock was selected over Atwater as a stop due to the distance between adjacent stations potentially resulting in fewer bottlenecks for freight trains.
The Fresno Subdivision is a railroad in California owned and operated by the Union Pacific Railroad. Mostly built by the Southern Pacific Railroad in the 1870s, the line traverses the San Joaquin Valley on a northwest to southeast alignment.
