Elm Fork Bridge carried important two-way traffic over the Elm Fork of the Trinity River for Denton County's growing automobile travel in the 1920s. One of only two accessible iron and steel bridges in Denton County that remain in their original location on public land, it received concrete piers and abutments in early March 1922 while crews awaited steel shipments later that month. Its main span is a 100-foot Pratt through-truss, and its east and west approach spans are 70-foot Warren pony trusses. Unlike early iron bridges that could accommodate only one-way traffic, this bridge was built for two-way use as automobile numbers increased. It stood on one of the original wagon trails leading out of Denton, on the road known as Sherman Highway, which connected Denton, Aubrey and Sanger. The bridge also served early farms and cattle ranches in the area, some of which were later inundated when the river was dammed. It carried traffic until 1990, when Sherman Highway, now FM 428, was widened and the bridge was bypassed. It was then repurposed as a pedestrian bridge and remains in its original location as part of the Ray Roberts Lake State Park Greenbelt, a wilderness recreation area opened on National Trails Day in 1999 with a 20-mile multiuse trail following the banks of the Elm Fork of the Trinity River.