The Foothill Extension is an extension of the
Los Angeles Metro Rail
The Los Angeles Metro Rail is an urban rail transit system serving Los Angeles County, California, United States. It consists of seven lines, including five light rail lines (the A, C, E, K, L lines) and two rapid transit (known locally as ...
L Line light rail line from its former terminus in
Pasadena
Pasadena ( ) is a city in Los Angeles County, California, northeast of downtown Los Angeles. It is the most populous city and the primary cultural center of the San Gabriel Valley. Old Pasadena is the city's original commercial district.
Its ...
,
California
California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the ...
, east through the "Foothill Cities" of
Los Angeles County
Los Angeles County, officially the County of Los Angeles, and sometimes abbreviated as L.A. County, is the most populous county in the United States and in the U.S. state of California, with 9,861,224 residents estimated as of 2022. It is th ...
. The first stage of the plan, Phase 2A, extended the L Line (then known as the Gold Line) from Pasadena to
Azusa; it opened on March 5, 2016. Phase 2B, which will extend the line a further four stations to
Pomona–North, broke ground in December 2017.
The corridor extension forms a part of the
Los Angeles Metro Rail
The Los Angeles Metro Rail is an urban rail transit system serving Los Angeles County, California, United States. It consists of seven lines, including five light rail lines (the A, C, E, K, L lines) and two rapid transit (known locally as ...
system. It is being planned and implemented by Foothill Gold Line.
In addition to enhancing mobility in one of the most congested metropolitan areas in the United States, the is seen as an economic catalyst for the region, generating 6,900 jobs during the construction phase and creating infill and
transit-oriented development
In urban planning, transit-oriented development (TOD) is a type of urban development that maximizes the amount of residential, business and leisure space within walking distance of public transport. It promotes a symbiotic relationship betw ...
opportunities.
By the time this project is fully completed, the
Regional Connector
The Regional Connector Transit Project is a transit project currently constructing a light rail tunnel for the Los Angeles Metro Rail system in Downtown Los Angeles. It is designed to connect the A Line and E Line, which currently end at 7 ...
will have already begun revenue service, at which time the north (Pasadena–Azusa–Pomona) branch of the L Line will be absorbed into the
A Line, providing service from Long Beach via Downtown Los Angeles and Pasadena to Pomona.
Route

The entire route (Phase 2A and 2B) of the Foothill Extension follows the roadbed of the former
Atchison, Topeka & Santa Fe Railway
The Atchison, Topeka and Santa Fe Railway , often referred to as the Santa Fe or AT&SF, was one of the larger railroads in the United States. The railroad was chartered in February 1859 to serve the cities of Atchison and Topeka, Kansas, and S ...
's
Second Division through the Foothill Cities. These cities are in the foothills south of the San Gabriel Mountains, in the northern San Gabriel and Pomona Valleys. Beginning at the existing L Line station in East Pasadena, the route extends roughly east, ending in Montclair. The route parallels several major roads and highways, including
I-210 (Foothill Freeway), Huntington Drive, and Foothill Boulevard.
Planning and Phase 2A
The Foothill Extension was initially conceived as Phase 2 of the Metro L Line (then known as the Gold Line). The route between Los Angeles and Pasadena is considered "Phase 1"; calling the Foothill Extension Phase 2 turned out to be a misnumbering, as the Gold Line Eastside Extension was completed in 2009 between the two phases. The Gold Line Construction Authority (now Foothill Gold Line), which took over the Phase 1 project from Metro in 1999, is also coordinating the Phase 2 projects.
The initial Draft
Environmental Impact Report (DEIR) for the Foothill Extension was completed in April 2006 and covered the entire corridor between
Sierra Madre Villa station in Pasadena and Montclair. The Final Environmental Impact Report (FEIR) study assessed two different construction options: an ''LRT Full Build'' alternative, which would complete the full extension to Montclair, and an ''LRT Build To Azusa'' 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.
In October 2009, the Metro board unanimously voted to include the 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;
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;
in March 2011, the Construction Authority requested a $45 million increase in total budget, to $735 million, to reflect updated cost estimates.
Phase 2B to Montclair
Phase 2B is the project to extend the L Line from the Phase 2A terminus in Azusa east to
Montclair. The Final EIR was certified by the Authority Board in March 2013.
Proposed station listing

Phase 2B is long and will take approximately 17.9 minutes to traverse.
The alignment will have six new Metro stations: Glendora; San Dimas; La Verne; Pomona, at
Pomona (North) Metrolink station with a connection to
San Bernardino Line
The San Bernardino Line is a Metrolink line running between Downtown Los Angeles east through the San Gabriel Valley and the Inland Empire to San Bernardino, with express service to Redlands. It is one of the three initial lines (along with ...
; Claremont, at
Claremont Metrolink station with a connection to
San Bernardino Line
The San Bernardino Line is a Metrolink line running between Downtown Los Angeles east through the San Gabriel Valley and the Inland Empire to San Bernardino, with express service to Redlands. It is one of the three initial lines (along with ...
; and Montclair, at
Montclair Transcenter with a connection to
San Bernardino Line
The San Bernardino Line is a Metrolink line running between Downtown Los Angeles east through the San Gabriel Valley and the Inland Empire to San Bernardino, with express service to Redlands. It is one of the three initial lines (along with ...
and
Foothill Transit Silver Streak.
Foothill Gold Line expects 17,800 riders by 2035.
Status
Planning for the Foothill Extension Phase 2B (
Azusa to
Montclair) began in 2003, and significant work has been completed for the segment. The Final EIR for the project was certified by the Construction Authority board in March 2013, and advanced conceptual engineering began in 2014. On June 23, 2017,
LA Metro's board of directors approved a $1.4 billion budget Thursday to extend the L Line (then the Gold Line) from APU/Citrus College station to Claremont, to the east. It is expected to cost an additional $70 million to extend the L Line from
Claremont Claremont may refer to:
Places Australia
*Claremont, Ipswich, a heritage-listed house in Queensland
* Claremont, Tasmania, a suburb of Hobart
* Claremont, Western Australia, a suburb of Perth
** Claremont Football Club, West Australian Footba ...
to
Montclair, across county lines.
Phase 2B of the Foothill Extension is composed of Project 1 and Project 2.
Project 1 is the relocation of freight railroad tracks, which is complete. Project 2 is the construction of the light rail line itself the
L Line utilizes, which started construction in 2022.
(more information below)
On December 2, 2017, officials broke ground for Phase 2B in a ceremony at
Citrus College. The cost of the project is estimated at $1.5 billion.
Completion of Phase 2B (including
Montclair Transcenter) is expected by early 2026.
On July 10, 2020, major construction began on Phase 2B, building four stations from Azusa to Pomona, with service estimated to start in 2025. Full construction to Claremont and Montclair by 2028 depends on additional funding to be secured by October 2021.
On September 10, 2021, funding was past due for constructing the route further east of Pomona, pushing the opening date to Montclair back or outright canceling the 3.3-mile segment altogether.
The first part of the construction, starting in August, focused on reconstructing the 28 at-grade crossings and relocating utilities. Gladstone Street in San Dimas was the first one to begin. Nearly all reconstructions commenced and finished in late 2022, with the final finishing this year. , the At-Grade Crossing reconstruction is over 96% complete.
The freight/light rail bridges over channels and washes began in 2021, relocating and building new bridges to facilitate the freight and 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 the California Public Utilities Commission (CPUC), the light rail crossing at Foothill Blvd, Route 66, Lone Hill Blvd, and Bonita/Cataract Ave is needed to be grade-separated (light rail only) with a flyover bridge. Those bridges feature the neighborhood's citrus design and will include local artwork. 18 of 19 bridges have been completed.
The more complex component was the freight track relocation. The freight existed in the middle of the ROW, 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 is complete as of October 2022.
The light rail system was the last to begin (in 2022). Since the freight relocation was completed, the light rail track work and systems are under installation, mainly in Glendora, San Dimas, and La Verne. Systems are already almost 50% complete. The platform construction is also finally underway at all stations, focusing on finishing the deck (of the platform). Like the bridges, stations will also show artwork from locals. Station construction is 18% complete.
, the extension is 63% complete (and on budget).
Proposed phase to Ontario Airport
California State Legislator
Chris Holden representing
California's 41st State Assembly district proposed a measure in January 2020 that would extend the final phase from Montclair to
Ontario International Airport
Ontario International Airport is an international airport two miles east of downtown Ontario, in San Bernardino County, California, United States, about east of downtown Los Angeles and west of downtown San Bernardino. It is owned and oper ...
. The planned terminus in
Montclair is from the airport. Measure AB 2011 would form the project's San Bernardino County Rail Construction authority.
References
External links
Foothill Gold Linenbsp;– the construction authority overseeing this project.
Los Angeles County Metropolitan Transportation Authority (Metro)nbsp;– the county's transportation planning agency.
Los Angeles Metro Gold Line Foothill Extension: A Photo Essay
{{IE Mass Transit
.
Los Angeles Metro Rail projects
Proposed railway lines in California
Public transportation in the San Gabriel Valley
Railway lines opened in 2016
Tram and light rail transit systems under construction
2025 in rail transport
2028 in rail transport