West Texas’ Castner Range and southern Nevada’s Avi Kwa Ame — also known as Spirit Mountain — are the United States’ two newest National Monuments.
The two tracts are home to multiple desert plants and animals, some listed as threatened, and carry significance for Native American tribes.
The Biden administration framed the announcement as part of its “commitment to protect historically and scientifically important sites, honor culturally significant areas, and conserve and restore our country’s treasured outdoor spaces.”
The designations come on the heels of the President’s approval of the Willow project, a controversial, decades-long oil drilling venture in far northern Alaska. (The Department of the Interior noted a reduction in the project’s scope since its original proposal in 2021.)
President Biden’s first national monument focused around Colorado’s Camp Hale. Continental Divide National Monument was designated in October 2022. As national monuments under the Antiquities Act of 1906, Castner Range and Avi Kwa Ame are now protected from private development.
Avi Kwa Ame National Monument
Avi Kwa Ame covers several mountain peaks and 506,814 acres of land just west of Lake Mohave along the Nevada/Arizona border. It was previously listed on the United States National Register of Historic Places as a sacred location for Native Americans.
The Mojave, Chemehuevi, and “some” Southern Paiute people count Avi Kwa Ame among the most sacred places on Earth, the White House said in a press release. Eleven other Tribal Nations and Indigenous peoples also celebrate the location.
Avi Kwa Ame also lies within one of the world’s largest Joshua tree forests. Natural springs, dark skies, and “natural soundscapes” characterize the environment.

Castner Range National Monument
