The Lake Margaret Tram was located on the western side of Mount Sedgwick in the West Coast Range on the West Coast of Tasmania in service for the Mount Lyell Mining and Railway Company to the Lake Margaret community .
By 1903, the timber areas having been cut out around Queenstown itself, the wood cutters moved to Howard's Plains situated on the plateau north west of Queenstown. As access onto the plateau was steep, a self-acting 2 ft (610 mm) narrow gauge dual haulage was built. From the top of the incline, a tramway was laid and was extended, over a period of time, some 4¼ miles towards Lake Margaret.
Following the decision to build the Lake Margaret Power Station, the Howard's Plains Tram was extended from its then terminus at the 4¼ mile peg. Work commenced on the extension on 19 August 1912. The Howard's Plains tram was completely upgraded. The total distance from the haulage to the power station being 7 miles, including a zig zag along the line.
Following the completion of the power station on 28 November 1914, the tram continued to provide firewood as well as a freight and passenger service for employees and their families living at the isolated settlement. A second power station was built a mile below the first station, in 1931, and was also linked by tramway.
In 1937, the terminus of the line was moved from the top of the haulage to its junction with the Queenstown to Strahan road. The haulage being no longer required after the construction of that road. Upon completion of the road to Zeehan in 1941, the terminus was moved again, out to its junction with that road, approximately 3 miles from Queenstown.