Cog Railway References Images Cog Railway railway, Mount Washington, New Hampshire Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: New Hampshire/ TransportationOutstanding among these is the Cog Railway, a 6-mile (10-km) line running to the summit of Mount Washington that has been in operation since 1869. Read MoreOutstanding among these is the Cog Railway, a 6-mile (10-km) line running to the summit of Mount Washington that has been in operation since 1869. Read More