The Isle of Man Railway (IMR) is a narrow gauge steam-operated railway connecting Douglas with Castletown and Port Erin on the Isle of Man. The line is 3 ft narrow gauge and 15+1⁄2 miles long. It is the remainder of what was a much larger network that also served the small western hamlet of Peel, the northern town of Ramsey and the small mining village of Foxdale. Now in government ownership, it uses original rolling stock and locomotives and there are few concessions to modernity.

Douglas is the capital city and largest settlement of the Isle of Man, with a population of 26,677 (2021) and an area of 10.5 km2. It is located at the mouth of the River Douglas, and on a sweeping bay of two miles. The River Douglas forms part of the city's harbour and main commercial port.