CIÉNEGA DE SANTA CLARA, Mexico — The rusty observation tower at the edge of this wastewater-fed marsh offers an osprey-eye view of two possible futures for the parched and overworked Colorado River.

You might think a mighty river carving the Grand Canyon would easily make its journey to the ocean. The truth is far more ...

In 2014 and 2015, Owen followed the Colorado River, from its headwaters just over the Continental Divide in northern Colorado, to where it winds down as a dry ditch in the Gulf of California at the ...

The Colorado River Indian Tribes of Arizona and California voted this month to give their namesake waterway the same legal rights as a person, saying the ‘living being’ deserves more protection while ...

This story was originally published by CalMatters. Sign up for their newsletters. The clock is ticking down to a federal deadline Tuesday for California and six other Western states to reach the broad ...

Water from the Colorado River and its tributaries irrigates farms, sprinkles lawns and quenches the thirst of millions across Utah and the greater Southwest. While only 27% of the state’s water comes ...

Not so long ago, the Colorado River Delta near Yuma was 3,000 square miles of buzzing life, home to great stands of willows, cottonwoods and chattering legions of birds. On its damp floodplains, ...