The Gateway Trail Iron Bridge is a historic camelback truss bridge on the Gateway State Trail in Stillwater Township, Minnesota, United States. The bridge has stood in three locations in Minnesota. Its main span was built of wrought iron in 1873—before steel became the preferred material for metal bridges—and erected in Sauk Centre in Central Minnesota. Designated Bridge No. 5721, it was refurbished and moved in 1937 to rural Koochiching County in northern Minnesota, where it became known as the Silverdale Bridge. It was relocated to its present site in east-central Minnesota in 2011 and renamed Bridge No. 82524. It was listed on the National Register of Historic Places in 1998 for its state-level significance in engineering. It was nominated as a rare example of a wrought iron truss bridg