| Monterey County Rail Extension | |
|---|---|
 Salinas station will be the morning starting point for planned weekday train service to San Francisco via the Monterey County Rail Extension. | |
| Overview | |
| Service type | Inter-city rail |
| Status | Planned |
| Locale | Northern California, United States |
| Current operator(s) | Caltrain |
| Website | Monterey County Rail Extension |
| Route | |
| Termini | Salinas San Francisco (4th and King) |
| Distance travelled | 122 mi (196 km) |
| Service frequency | Twice daily (proposed)
|
The Monterey County Rail Extension is a planned commuter rail extension that would bring Caltrain passenger service south of its existing Gilroy, California terminus to Salinas in Monterey County, using the existing Coast Line owned by Union Pacific (UPRR). Implementation of the rail extension will occur over three phases, starting from Salinas and moving north. When construction is complete, there will be four trains operated over the extended line per weekday: two northbound trains that depart from Salinas and travel to San Francisco in the morning, and two southbound trains that return to Salinas in the afternoon.