Metrolink (California)

Metrolink
Metrolink
	A Metrolink train stopped at Chatsworth station
Overview
Locale	Southern California
Transit type	Commuter rail
Number of lines	8;
Number of stations	69
Daily ridership	20,800 (weekdays, Q4 2025)
Annual ridership	6,063,500 (2025)
Chief executive	Darren Kettle
Headquarters	Wilshire Grand Center; Los Angeles, California
Website	metrolinktrains.com
Operation
Began operation	October 26, 1992
Operator(s)	Alstom
Reporting marks	SCAX
Infrastructure managers	Southern California Regional Rail Authority; BNSF Railway; North County Transit District; Union Pacific Railroad;
Number of vehicles	60 locomotives, 274 rail cars, 3 DMU vehicles (Arrow), 1 ZEMU vehicle (Arrow)
Technical
System length	545.6 mi (878.1 km)
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Top speed	90 mph (140 km/h)
System map
System map
	L.A. General
	Medical Center
	Laguna Niguel/
	Mission Viejo
	week-
	ends
	Riverside–
	Hunter Park/UCR
	proposed extension
Key
	Inland Empire–
	Orange County Line
	stations with
	Amtrak service
	All stations are accessible

Metrolink (reporting mark SCAX) is a commuter rail system in Southern California, serving Los Angeles, Orange, Riverside, San Bernardino, San Diego and Ventura counties. The system consists of eight lines and 69 stations operating on 545.6 miles (878.1 km) of track. This includes Arrow, which Metrolink operates under a contract with the San Bernardino County Transportation Authority (SBCTA).

In 2025, the system had a ridership of 6,063,500, or about 20,800 per weekday as of the fourth quarter of 2025.

Metrolink connects with Los Angeles County's Metro Rail and Metro Busway systems, North County Transit District's Coaster commuter rail and Sprinter hybrid rail services, and with Amtrak's Pacific Surfliner, Coast Starlight, Southwest Chief, Sunset Limited, and Texas Eagle inter-city rail services. Metrolink owns several hundred miles of track; however, it also shares track with freight railroads.

The system, founded in 1991 as the Southern California Regional Rail Authority (SCRRA) and adopting "Metrolink" as its moniker, started operation in 1992. Average weekday ridership was 42,928 as of 2017. The SCRRA contracts with Alstom both to operate the trains and to maintain the rolling stock (locomotives and passenger cars).