Foothill Extension

 Foothill Extension 
Overview
StatusPhase 2A: Complete
Phase 2B1: In testing
Phase 2B2: Planned
LocaleLos Angeles, Pasadena, Azusa, Pomona
Termini
Stations6 (Phase 2A)
4 (Phase 2B1)
2 (Phase 2B2)
Service
TypeLight rail
SystemLos Angeles Metro Rail
Operator(s) Metro (LACMTA)
History
OpenedMarch 5, 2016 (2016-03-05) (Phase 2A)
2025 (Phase 2B1)
2030 (2030) (Phase 2B2)
Technical
Line length11.5 mi (18.5 km) (Phase 2A)
9.1 mi (14.6 km) (Phase 2B to Pomona)
3.2 mi (5.1 km) (Phase 2B to Montclair)
Track gauge4 ft 8+12 in (1,435 mm)
ElectrificationOverhead line, 750 V DC
Route map
Phase 2A highlighted in red, 2B to Pomona in green, 2B to Montclair in blue
Montclair
Claremont
planned (2030)
Phase 2B (2025)
Pomona North
La Verne/Fairplex
San Dimas
Glendora
Phase 2B (2025)
Phase 2A (2016)
APU/Citrus College
Azusa Downtown
Irwindale
Duarte/City of Hope
Monrovia
Arcadia
Sierra Madre Villa

All stations
are accessible
All stations
have parking

The Foothill Extension (formerly the Gold Line Foothill Extension) is a construction project extending the light rail A Line, a part of the Los Angeles Metro Rail system. The project begins at the former terminus of the former Gold Line at Sierra Madre Villa station in Pasadena and continues east through the "Foothill Cities" of Los Angeles County. The plan's first stage, "Phase 2A", extended the then-Gold Line to APU/Citrus College station in Azusa; it opened on March 5, 2016. The first part of "Phase 2B" will extend the now A Line a further four stations to Pomona North station on the Metrolink San Bernardino Line in Pomona. It broke ground in December 2017, was substantially completed on January 3, 2025, and is currently undergoing pre-revenue testing. Pre-revenue testing will last through August 2025, with an opening date expected around then or later in the summer.

The second part of Phase 2B will further extend the line two stations to the Montclair Transcenter in San Bernardino County. This phase is planned to break ground in spring 2025, and is expected to be completed in 2030.

The corridor extension is being planned, managed, and implemented by the Foothill Gold Line Construction Authority, simply known as Foothill Gold Line. The joint powers authority is governed by appointees from the Los Angeles County Metropolitan Transportation Authority (Metro), the San Bernardino County Transportation Authority (SBCTA), the San Gabriel Valley Council of Governments (SVGCOG), and the cities of Los Angeles, South Pasadena, and Pasadena. 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 and transit-oriented development opportunities.

With the Regional Connector having opened on June 16, 2023, the north (Pasadena–Azusa–Pomona) branch of the then-L/Gold Line was absorbed into the A Line, providing service from Long Beach via Downtown Los Angeles and Pasadena to Azusa.