United States of America
Chuckwalla National Monument is a national monument in the Colorado Desert of Southern California that protects 624,270 acres (2,526.3 km2; 252,630 ha) of desert habitat in Riverside and Imperial counties from development. The monument spans several mountain ranges between Joshua Tree National Park
and the Chocolate Mountain Aerial Gunnery Range. President Joe Biden established the monument by proclamation under the Antiquities Act on January 14, 2025. The proclamation includes co-management by a commission established by five local tribes.
Listen to the audio guide for Chuckwalla National Monument Free on WIP — starts by itself when you arrive, even with the screen off