North of Tucson, regardless of whether the east or west option is selected, the new highway corridor would run alongside Sonoran Desert National Monument, threatening its wilderness and recreation.

Experts differ on the president’s power to end protections for about 740,000 acres of desert in eastern Riverside County.

“Interstate 11 would devastate treasured places like the Sonoran Desert National Monument. It also poses grave threats to endangered wildlife like cactus ferruginous pygmy owls. I hope this agreement ...

This year marks the 25th year since the Ironwood Forest National Monument was proclaimed in June of 2000. The Monument boundary includes 189,000 acres of natural Sonoran Desert and includes seven ...

This section of the Sonoran Desert near the border between Arizona and Mexico features ... crucial funding – up to $6.65 billion over five years – to fix our national parks’ crumbling roads, decaying ...

The fate of Chuckwalla National Monument could come down to whether ... Named for the lizard found in the Sonoran and Mojave Desert and northwestern Mexico, Chuckwalla, which borders Joshua ...