Relay is a small town south of Baltimore near BWI. Many may know it as Saint Dennis, but it’s actually right next to Saint Dennis. Relay is where the CSX Capital subdivision and the CSX Old Main Line subdivision meet. From the perspective of the railfan, the Old Main Line (OML) will be closest to the road and the Capital Subdivision the two tracks farthest from the road. Railfans can expect to see a good variety of trains here. Maryland Area Rail Commuter (MARC) passenger trains run only during morning and evening rush hours. The Capital Subdivision hosts the Juice Train from Florida, auto-racks, and other mixed freight. The OML hosts mix freight, auto-racks, and coal.

Relay is an enjoyable location for train watching, and during the summer period, it provides some unique photographs. During a brief period from late May to early July, the morning sun gets high enough in the sky that it is possible to photograph northbound trains with proper lighting. In addition to a brief period during the year, railfans will only have a few hours during the morning before the sun moves across the tracks and backlights the trains.

Relay MD can be located by searching Google Maps for “Relay Maryland” or using these GPS coordinates: 39°13’27.6″N 76°42’33.2″W

The area is safe and railfans are a common sight. Be careful of straying too far off the road as the railroad runs right up against the road and trespassing is a crime.