Caltrain is a commuter rail service that operates between San Francisco and San Jose in California. It provides an essential transportation option for residents and workers in the San Francisco Bay Area, connecting various cities and neighborhoods along the Peninsula. The service features multiple stops, making it convenient for passengers to access key locations. Caltrain operates different types of trains, including local, limited, and express services, catering to various travel needs. It also offers amenities like free Wi-Fi and bike storage, promoting sustainable commuting options for its riders.