Imjingang station is one of the stations along Gyeongui Line

Gyeongui Line

The Gyeongui Line is one of the oldest railway lines in Korea. When opened in 1906 it linked Seoul in what is now South Korea to P'yŏngyang and Sinŭiju in what is now North Korea...

, and it has trains to Seoul Station

Seoul Station

Seoul Station is a major railway station in Seoul, South Korea. The station is served by the Gyeongbu Line, its high-speed counterpart and the Gyeongui Line, with frequent high-speed, express, and local services to various points in South Korea.-Services:...

 via Ilsan

Ilsan

Ilsan is the name of two districts or wards in Goyang, Gyeonggi-do, South Korea...

 every hour between 6am and mid-night. It was the northernmost station in Gyeongui Line

Gyeongui Line

The Gyeongui Line is one of the oldest railway lines in Korea. When opened in 1906 it linked Seoul in what is now South Korea to P'yŏngyang and Sinŭiju in what is now North Korea...

 before Dorasan Station

Dorasan Station

Dorasan Station is a railroad station situated on the Gyeongui Line, which once connected North and South Korea and has now been restored. For several years the northernmost stop on the line was Dorasan Station, which is served by Tonggeun commuter trains....

opened.
There are 18 stops between Seoul Station and Imjingang. The train is popular on the week-end so make sure you go to the train at least 30 minutes early so you can get a good seat.
The train picks up passengers at every stop so by the time you arrive at Imjingang there are many passengers standing in the aisle.
The fee is 1,400 won one way.