The Metrolink Ventura County Line is a commuter rail line serving Ventura County and the San Fernando Valley in Los Angeles County and the City of Los Angeles, in the Southern California system.
Metrolink trains on the Ventura County Line run weekdays only, mostly during peak commuter hours, and so with limited midday service. From Union Station—Downtown Los Angeles (as 7-2011):
- East Ventura
- six trains total at peak hours, in the peak direction only (3 south-AM; 3 north PM) each weekday, running to East Ventura station (in the community of Montalvo) — northern end of line.
- four trains each weekday run to Moorpark Station (far western Simi Valley) — also station for Amtrak Pacific Surfliner. Trains of the six East Ventura runs also stop here.
Other service 
Service is augmented during midday and on weekends by the Amtrak Pacific Surfliner line, serving most of the Metrolink stations on the Ventura County Line.
Additional airport shuttle service operates between Union Station and Bob Hope Airport station as the Burbank-Bob Hope Airport Line—BUR. Metrolink numbers Airport Line trains in the 900 series.
Metrolink owns the tracks between Moorpark and Los Angeles Union Station. It uses the Coast Line of the Union Pacific Railroad between Moorpark and Oxnard where the Santa Paula Branch splits from the rest of the Coast Line. The East Ventura Station and layover facility are on the Santa Paula branch line.
Service on this line began in 1992 as one of Metrolink's original three lines, with service from Moorpark to Los Angeles Union Station in Downtown Los Angeles. The line was extended to Camarillo and Oxnard in 1994 after the Northridge earthquake, then to East Ventura in 2002.
At 4:23 p.m. on September 12, 2008, 25 people were killed in a collision between Metrolink commuter train 111 and a freight train. At least 130 people were injured, with at least one dying later at a hospital. The crash occurred on the Ventura County Line near Heather Lee Lane, south of the Ronald Reagan (118) Freeway and east of Topanga Canyon Boulevard. Both locomotives, the leading car of the commuter train, and seven cars of the freight train were derailed.
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