The Stone Bridge is a causeway built by the United States Army in 1867. It crosses the marshy channel that connects Hart Lake and Crump Lake in a remote area of Lake County in eastern Oregon, United States. It was later incorporated into the Oregon Central Military Wagon Road which was completed in 1872. The wagon road eventually became the subject of scandal and litigation ending with a United States Supreme Court decision in 1893. The Stone Bridge and the Oregon Central Military Wagon Road were listed together on the National Register of Historic Places in 1974. Today, the Stone Bridge is located on land claimed by the State of Oregon under riparian rights.