Craters of the Moon

2. Park Sign

The Craters of the Moon National Monument was established by President Coolidge on May 2, 1924. Since 1924, the monument has been expanded through five presidential proclamations issued in accordance with the Antiquities Act. The most recent and largest expansion of the monument occurred November 9, 2000 when President Clinton signed a Proclamation enlarging the monument 13-fold. The monument now contains 715,000 acres of federal land.