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 Foothill Freeway overpass east ofSierra Madre Villa station | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Overview | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Status | Phase 2A: Complete Phase 2B to Pomona: Complete Phase 2B to Claremont: In planning Phase 2B to Montclair: On hold | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Locale | Los Angeles,Pasadena,Azusa,Pomona | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Termini |
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| Stations | 6 (Phase 2A) 4 (Phase 2B to Pomona) 1 (Phase 2B to Claremont) 1 (Phase 2B to Montclair) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Service | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Type | Light rail | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| System | Los Angeles Metro Rail | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Operator(s) | Los Angeles Metro | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| History | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Planned opening | 2031 (2031) (Phase 2B to Claremont) TBD (Phase 2B to Montclair) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Opened | March 5, 2016; 9 years ago (2016-03-05) (Phase 2A) September 19, 2025; 2 months ago (2025-09-19) (Phase 2B to Pomona) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Technical | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Line length | 11.5 mi (18.5 km) (Phase 2A)[1] 9.1 mi (14.6 km) (Phase 2B to Pomona)[2] 2 mi (3.2 km) (Phase 2B to Claremont)[2][3] 1.2 mi (1.9 km) (Phase 2B to Montclair)[2][3] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Electrification | Overhead line, 750 V DC | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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TheFoothill Extension (formerly theGold Line Foothill Extension) is a construction project extending thelight railA Line, a part of theLos Angeles Metro Rail system. The project begins at the former terminus of the formerGold Line atSierra Madre Villa station inPasadena and continues east through the "Foothill Cities" ofLos Angeles County. The plan's first stage, "Phase 2A", extended the then-Gold Line toAPU/Citrus College station inAzusa; it opened on March 5, 2016. The first part of "Phase 2B" extended the now A Line a further four stations toPomona North station on theMetrolinkSan Bernardino Line inPomona, thereby returning passenger rail service to the full right of way originally built out by theLos Angeles and San Gabriel Valley Railroad in 1887. It broke ground in December 2017 and opened on September 19, 2025.
The second part of Phase 2B will further extend the line east to theClaremont San Bernardino Line station. Construction is expected to break ground in 2027 and be completed in 2031.
The corridor extension is being planned, managed, and implemented by the Foothill Gold Line Construction Authority, simply known as Foothill Gold Line.[4][5] Thejoint powers authority is governed by appointees fromLos Angeles Metro, theSan Bernardino County Transportation Authority (SBCTA), the San Gabriel Valley Council of Governments (SVGCOG), and the cities ofLos Angeles,South Pasadena, andPasadena. In addition to enhancing mobility in one of the most congested metropolitan areas in the United States, the 23.8-mile project (38.3 km) is seen as an economic catalyst for the region, generating 6,900 jobs during the construction phase and creating infill andtransit-oriented development opportunities.[6]
With theRegional Connector having opened on June 16, 2023,[7] the north (Pasadena–Azusa–Pomona) branch of the then-L/Gold Line was absorbed into theA Line, providing service from Long Beach via Downtown Los Angeles and Pasadena to Azusa.[8][9][10]
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The entire 23.8-mile (38.3 km) route (Phase 2A and 2B) of the Foothill Extension follows the roadbed of the formerAtchison, Topeka & Santa Fe Railway'sSecond Division through the Foothill Cities. These cities are in the foothills south of theSan Gabriel Mountains, in the northernSan Gabriel andPomona valleys. Beginning at the formerGold Line terminus atSierra Madre Villa station inPasadena, the route extends roughly east, ending atMontclair Transcenter inMontclair, inSan Bernardino County. The route parallels several major roads and highways, including I-210 (Foothill Freeway),Huntington Drive, andFoothill Boulevard.[11]
The Foothill Extension was initially conceived as "Phase 2" of theGold Line, split into two parts, hence the numbering of its two phases. The route betweenLos Angeles andPasadena is considered "Phase 1". The Gold Line Construction Authority (now Foothill Gold Line), which took over the Phase 1 project from Metro in 1999, also coordinates the Phase 2 projects.
The initialdraft environmental impact report (DEIR) for the Gold Line Foothill Extension was completed in April 2006 and covered the entire corridor betweenSierra Madre Villa station in Pasadena andMontclair Transcenter inMontclair. The final environmental impact report (FEIR) study assessed two different construction options: anLRT Full Build alternative, which would complete the full extension to Montclair, and anLRT Build ToAzusa alternative, which would extend only to Azusa; this was dubbed Phase 2A. On February 28, 2007, the Construction Authority Board certified the final EIR and decided to complete the "LRT Build to Azusa" alternative.[12]
In October 2009, theLos Angeles Metro board of directors unanimously voted to include the Gold Line Foothill Extension in its long-range plan and approved funding for the construction and operation of Phase 2A. A groundbreaking ceremony for Phase 2A was held on June 26, 2010;[13] construction began the following summer and was completed in September 2015, with the extension entering service on March 5, 2016. The original project budget for Phase 2A was $690 million, including not only construction but also the purchase of vehicles, financing, administrative costs, mitigation, and other costs;[14] in March 2011, the Construction Authority requested a $45 million increase in total budget, to $735 million, to reflect updated cost estimates.[15] Phase 2A is 11.5 miles (18.5 km) long and included stations atArcadia,Monrovia,Duarte/City of Hope,Irwindale,Azusa Downtown, andAPU/Citrus College, as well as a newDivision 24 Maintenance and Storage Facility.[1]
Phase 2B is the project to extend the A Line from the Phase 2A terminus inAzusa east toMontclair. The final EIR was certified by the Foothill Gold Line Construction Authority (Foothill Gold Line) board in March 2013.[16]
Phase 2B is 12.3 miles (19.8 km) long and will take approximately 17.9 minutes to traverse.[11] The segment betweenAzusa andPomona is 9.1 miles (14.6 km) long and the segment between Pomona andMontclair is 3.2 miles (5.1 km) long.[2] The alignment will have six new Metro stations:Glendora;San Dimas;La Verne/Fairplex; andPomona North with a connection to theMetrolinkSan Bernardino Line;Claremont with a connection to the Metrolink San Bernardino Line; andMontclair with a connection to the Metrolink San Bernardino Line. Foothill Gold Line expects 17,800 riders by 2035.[17]
Planning for the Foothill Extension Phase 2B (Azusa–Montclair) began in 2003, and significant work has been completed for the segment. The final EIR for the project was certified by the Foothill Gold Line board in March 2013, and advanced conceptual engineering began in 2014. On June 23, 2017, theLos Angeles Metro board of directors approved a $1.4 billion budget to extend theA Line (then theGold Line) fromAPU/Citrus College station inPasadena toClaremont station inClaremont, 11.5 miles (18.5 km) to the east.[18] However, officials inSan Bernardino County convinced planners to further continue the extension toMontclair Transcenter in Montclair, an additional 0.8 miles (1.3 km) to the east, saying the transit center made for a natural terminus for the line.[19] It is expected to cost an additional $70 million to extend the A Line fromClaremont to Montclair, across county lines.[20] Construction on Phase 2B of the Foothill Extension is split into two projects. Project 1 is the relocation of freight railroad tracks, which is complete. Project 2 is the construction of the light rail line itself theA Line utilizes.[21]
Full construction to Claremont and Montclair by 2028 depended on additional funding to be secured by October 2021.[22] However, on September 10, 2021, state funding was past due for constructing the route further east of Pomona. This pushed the opening date to Montclair back, as well as outright placing the 3.2-mile segment at risk of cancellation altogether.[23] However, Foothill Gold Line was persistent in seeking funding for the project.
On July 8, 2024,Governor of CaliforniaGavin Newsom and theCalifornia State Transportation Agency (CalSTA) announced the distribution of the first year of funding fromCalifornia State Senate Bill 125 (SB125).[24] Metro allocated $798 million of SB125 funding to complete theLos Angeles County portion of thePomona–Montclair segment. Courtesy of the state’s Transit and Intercity Rail Capital Program (TIRCP), CalSTA released close to $500 million for the project, with the remainder of the $798 million to be allocated by the end of 2024. On July 11, 2024, the Foothill Gold Line board of directors unanimously voted to work withKiewit Corporation as their contractor to build the Pomona–Montclair segment. The project's construction contract award is set for spring 2025 and should take five years to complete and open in 2030.[25][26] On October 31, 2024, having received the total $798 million in funding from CalSTA, the Metro board of directors unanimously voted to transfer the funds to Foothill Gold Line. Additionally, theSan Bernardino County Transportation Authority (SBCTA) has set aside $80 million in funding to directly fund the construction of the approximately 1-mile-long (1.6 km) segment of the extension withinSan Bernardino County, matching the project's current total estimated cost of $878 million.[27] However, on March 26, 2025, Foothill Gold Line canceled their bid with Kiewit due to the final bid remaining hundreds of millions of dollars above expert estimates and available funding.[28] If a new bid is accepted by October 15, 2025, construction will begin in 2027 with an updated completion date of 2031.[29] However, at a board meeting on September 3, 2025, the SBCTA board of directors voted to divest the $37 million it had allocated to the 0.65-mile-long (1.05 km) segment of the Pomona–Montclair segment within San Bernardino County, redirecting the funds to other uses due to rising costs and limited local input.[30][31][32] The decision placed the Claremont–Montclair segment on indefinite hold, while the Pomona–Claremont segment remained unaffected and is scheduled to be constructed independently of it.[33][34]
On December 2, 2017, officials broke ground for Phase 2B in a ceremony atCitrus College. The cost of the project was estimated at $1.5 billion.[35] Completion of Phase 2B (including Montclair Transcenter) was expected by early 2026.[21] On July 10, 2020, major construction began on Phase 2B, building four stations from Azusa to Pomona. The first part of the construction focused on reconstructing the 28 at-grade crossings and relocating utilities. Gladstone Street in San Dimas was the first one to begin.[36] Nearly all reconstructions commenced and finished in late 2022. As of June 2023, the at-grade crossing reconstructions were complete.[37]
The freight/light rail bridges over channels and washes began in 2021, relocating and building new bridges to facilitate the freight and the A Line (then known as the L Line). These bridges were the first to finish as they didn't impact vehicular traffic. The light rail bridges, crossing major streets, began briefly. As required by theCalifornia Public Utilities Commission (CPUC), the light rail crossing at Foothill Blvd, Route 66, Lone Hill Blvd, and Bonita/Cataract Ave needed to be grade-separated (light rail only) with a flyover bridge. Those bridges feature the neighborhood's citrus design and includes local artwork. All of these components were complete by June 2023.[38]
The more complex component was the freight track relocation. The freight originally existed in the middle of the corridor, leaving no room for the light rail extension. To create space, the construction authority relocated it to the north side (south side west of Lone Hill Blvd) of the alignment. It was complete by October 2022.[39] With the relocation work finished, crews began work on the light rail system by installing theoverhead line, train control systems, and the light rail track. On June 24, 2023, an event held in La Verne culminated in the installation of the 230,630th rail clip (rail clips permanently attach the steel rail to the concrete railroad ties), officially completing major construction for the new light rail tracks from Glendora to Pomona.[40]
The extension to Pomona reached substantial completion on January 3, 2025. Following this, Foothill Gold Line transferred ownership of the segment to Metro, who conducted pre-revenue testing along the segment.[41] Pre-revenue testing lasted through August 2025, with the extension opening on September 19, 2025.[42]
There has been past interest in extending theGold Line (now theA Line) fromMontclair Transcenter inMontclair toOntario International Airport. Currently, no active proposals exist to plan or construct this extension.
In 2006, when the city ofOntario joined the Foothill Gold Line Construction Authority, city leaders pushed to further extend the line toOntario International Airport.[19]
On March 9, 2009, the city passed a resolution affirming their support for this extension. The extension would be 7.5 miles (12.1 km) in length.[43]
In 2008, the Foothill Gold Line Construction Authority commissioned a study by KOA Corporation to determine the feasibility of such an extension, which they dubbed "Phase 2C."[44] The study found the extension would be feasible and provided several alignment alternatives. The extension would be between 7 miles (11 km) and 15 miles (24 km) and add up to four new stations, depending on the chosen alignment.[45]
In November 2014, theSan Bernardino Associated Governments (SANBAG), the precursor to theSan Bernardino County Transportation Authority (SBCTA), conducted a study focused on better servingOntario International Airport viapublic transport. Out of the six alternatives narrowed down from 32 that were more closely studied, one of these alternatives included "Alternative D-1", which proposed extending theGold Line fromMontclair Transcenter along theSan Bernardino Line until Cucamonga Creek, which the line would then follow to terminate at Ontario International Airport.[46]
In October 2018, theSouthern California Association of Governments (SCAG), in cooperation with the SBCTA and theLos Angeles Metro, conducted a transit and rail planning study for the corridor connecting the easternSan Gabriel Valley inLos Angeles County with the westernSan Bernardino Valley inSan Bernardino County.[47] This study considered two options for the "LRT Alternative", including extensions of the Gold Line to Ontario International Airport, the "Arterial Option" and the "Cucamonga Creek Option". The Arterial Option followed Indian Hill Boulevard andHolt Boulevard, while the Cucamonga Creek Option had the same routing as Alternative D-1 in the 2014 study.[48]
In January 2020,California State AssemblymanChris Holden (D-Pasadena), representingCalifornia's 41st State Assembly district, introduced Assembly Bill AB 2011. The measure would have formed the West San Bernardino County Rail Construction Authority, which would have designed and constructed the extension from Montclair to Ontario International Airport.[49]
Holden would be aided byCalifornia State SenatorAnthony Portantino (D-La Cañada Flintridge), representingCalifornia's 25th senatorial district, who introduced his bill, SB 1390, on February 21, 2020, which went even further and would have transferred taxpayer funds and land owned by the SBCTA within the proposed railright of way to a state-created independent construction authority.
Bothstate legislators presented their bills to the SBCTA board of directors at the March 7, 2020, board meeting. The board voted to oppose both bills and passed a motion reasserting itself as the sole authority to plan, design, and build new mass transit projects inSan Bernardino County.[50] Despite this, both bills were supported by the Foothill Gold Line Construction Authority.[51]
Neither bill was able to pass the state legislature. On May 18, 2020, the SBCTA ceased negotiations on amemorandum of understanding (MoU) on the extension, following Holden committing against further action on his legislative proposal, killing these attempts at the project.[52]
As a cost-effective solution compared to the proposed extension, estimated at around $1–1.5 billion,[53] SBCTA andOntario International Airport are currently in the process of trying to implement a tunnel with autonomous, zero-emission vehicles on an "on-demand" basis from theMetrolinkSan Bernardino Line'sRancho Cucamonga station toOntario International Airport.[54]
Initially,The Boring Company proposed constructing a single 2.8-mile (4.5 km) tunnel similar to theLas Vegas Convention Center Loop that would cost $60 million.[53] However, the company eventually dropped out of the project because they refused to submit another refined proposal.[55]
Despite this, the SBCTA moved forward with plans on the project.[56] The new plans for the project include two 4.2-mile (6.8 km) tunnels that will cost roughly $492 million.[57] The SBCTA selectedHNTB as their new contractor to design, build, and maintain the project.[58]
