Sierra Madre National Forest

Sierra Madre National Forest was established as the Sierra Madre Forest Reserve by the U.S. Forest Service in Wyoming on November 5, 1906 with 370,911 acres (1,501.02 km²). It became a National Forest on March 4, 1907. On July 1, 1908 the entire forest was combined with Park Range National Forest to create Hayden National Forest and the name was discontinued.