Researchers have tracked the Miocene Epoch’s version of the Colorado River to a now dry lakebed east-southeast of the Grand ...

Add Yahoo as a preferred source to see more of our stories on Google. Arizona Gov. Katie Hobbs said a meeting among most of the governors who are fighting over declining Colorado River water has put ...

Construction has begun on a connector trail in Moab along the Colorado River. The work is part of UDOT's statewide Utah Trail ...

New research shows how the Colorado River carved the Grand Canyon over millions of years, using zircon crystals to trace its ...

Geologists have solved the mystery of the disappearance from the geological record, millions of years ago, of one of North ...

New research suggests the Colorado River once pooled into a vast ancient lake before spilling over and carving the Grand Canyon. Using zircon crystal analysis, scientists traced sediments back to the ...

Offering a window into the five paths it will consider for the Colorado River, the Bureau of Reclamation released a road map to a seven-state deal. The agency released five alternatives to consider ...

Governors from Colorado River states made progress toward a shortage-sharing deal, Arizona's Katie Hobbs said, but differences remain over details. Hobbs said Arizona won't accept deeper cuts unless ...