Maroon Creek Bridge, Steel trestle bridge in Aspen, Colorado.

The original Maroon Creek Bridge is a steel trestle on State Highway 82 at Aspen's western edge. It has 20 plate girder spans carried by nine tapered steel piers, whose legs are paired steel channels braced by compression beams and tension eyebars and set on masonry footings. A parallel 2008 bridge, 620 feet long with a 270-foot main span, stands beside it.

The bridge components were manufactured in 1887 by the Niagara Iron Works in Buffalo, with the first train crossing occurring in February 1888. It was built as part of the Colorado Midland Railroad network to connect the mountain region with the valley below.

The bridge's name comes from Maroon Creek, which it crosses; the creek in turn takes its name from the maroon-colored peaks at the head of the valley. For decades the structure was the main road entrance to Aspen, so most postwar visitors to the ski resort drove over it. It is now a foot bridge beside the highway.

The original structure now serves pedestrians, while a parallel modern bridge built in 2008 carries vehicle traffic on State Highway 82. You can walk across the historic structure or view it from the newer bridge alongside.

The bridge's steel was delayed in transit, which cost the Colorado Midland Railroad the race to Aspen: the Denver and Rio Grande reached the silver town first, and the Midland followed a few months later. The bridge is also the most visible remnant of rail service to Aspen, since most track and the depots were later removed.