The New River Mountains are a small 14-mi (23 km) long mountain range in central Arizona, on the north border of the Phoenix valley; the range is located on the southwest perimeter of the Arizona transition zone.

The range is a sub-part of landforms extending south from the Black Hills of Yavapai County.

The New River Mountains are part of a region extending southwards from the southeast of the Black Hills of central Arizona.

The region contains mesas, hills, and mountain peaks; the region is bordered on the west by the Black Canyon, where the Agua Fria River flows south towards Phoenix, and on the east, canyons where the Verde River also flows south to enter the Phoenix valley.

The New River Mountains are easily accessed from Interstate 17 which borders the range on the west.