the forest. On November 6, 1906, President Roosevelt announced the addition of to the Sawtooth Forest Reserve, which then also constituted much of the present-day Salmon-Challis and Boise National Forests. These lands were split into separate National Forests by executive order on June 26 and July 1, 1908. The forest's area underwent a number of smaller changes in the early 20th century. The Fairfield Ranger District was established in 1906 and merged with the Shake Creek Ranger District in 1972 to form the present-day Fairfield District. The Cassia Forest Reserve was established on June 12, 1905 and the Raft River Forest Reserve on November 5, 1906. The names of the forest reserves were changed to national forests on March 4, 1907. Formed from the consolidation of Cassia and Raft River National Forests, the Minidoka National Forest was created on July 1, 1908, and then added to Sawtooth National Forest on July 1, 1953. In 1936, Senator James Pope, a one-term Democrat from Idaho, introduced the first legislation to establish a national park in the Sawtooths. Under his proposal, the park would have been approximately in length and wide. The rest of Idaho's congressional delegation did not support the proposal, which occurred at a time when the National Park Service was taking a more preservation-oriented stance, and the bill died. On October 12, 1937, the Forest Service established the Sawtooth Primitive Area in the Sawtooth Mountains. Subsequently, Sawtooth National Forest began to extensively develop recreation opportunities, including new campgrounds, trails, and roads. In 1960, Democratic Senator Frank Church of Idaho introduced legislation for a feasibility study to survey the area for national park status. While Church allowed the 1960 feasibility study legislation to die, he introduced a bill in 1963 to create Sawtooth Wilderness National Park, which would primarily encompass the existing Sawtooth Primitive Area. Although the 1963 bill also was not voted on, Church admitted that it was not designed to pass but rather to encourage thorough feasibility studies by both the Forest Service and National Park Service. A 1965 joint report by the two agencies recommended either a national park administered by the National Park Service or a national recreation area managed by the Forest Service. In April 1966, Church introduced two bills, one to establish Sawtooth National Park and another to establish the Sawtooth National Recreation Area (SNRA). The SNRA bill was cosponsored by Republican Senator Len Jordan,