Hoover-Mason Trestle, Elevated linear park on a former rail trestle in Bethlehem, Pennsylvania, United States

The Hoover-Mason Trestle is an elevated walkway built over the former steel mill grounds, offering views of five preserved blast furnaces from above. The structure sits among machinery, pipes, and industrial equipment that show how the steelworks operated.

Built in 1905, this narrow gauge railway transported raw materials from the Lehigh River to the steel mill's blast furnaces. The transport system was critical to steel production throughout the 20th century.

The walkway's name honours the Hoover and Mason engineering firms that built the ore-handling system. SteelStacks now hosts free Levitt Pavilion concerts on a lawn for 2,500 people, with the illuminated furnaces as a backdrop, and the route ends at the Wind Creek Bethlehem casino resort.

The 1,650-foot walkway links the Levitt Pavilion to Wind Creek Bethlehem, so it can be walked in either direction. The Levitt Pavilion lawn seats 2,500 people and faces the illuminated blast furnaces, which serve as the stage backdrop. Plantings along the route were designed by Patrick Cullina to highlight the lighting of the structures.

The steel mill produced material for the Golden Gate Bridge and numerous World War II naval vessels. The trestle still displays the railway infrastructure that moved these raw materials across the mill.