Plans for a new border wall in the San Rafael Valley are sparking criticism from wildlife experts who warn it could disrupt critical animal migration routes.

With record heat, surging trail use, and rising tensions over e-bikes and erosion, Arizona’s outdoor spaces are under ...

Water could soon return to another dry stretch of the Santa Cruz River, thanks to an effort by Pima County and others to use ...

The sponsor, Sen. Wendy Rogers, R-Flagstaff, said the money would allow Arizona to complete 17 miles of "wall." That would be about $41M per mile.

Orange no-entry signs posted by the U.S. military in English and Spanish dot the New Mexico desert, where a border wall cuts ...