Government officials cleared out a warmwater pool on the Colorado River that had become a breeding ground for pesky invasive ...

The Glen Canyon Dam holds back Colorado River water, which forms Lake Powell, seen from the air on April 15, 2023, in Page, Arizona. The flight for aerial photography was provided by LightHawk.

Emerald Cave, also known as Emerald Cove, shimmers with luminous green light. Here's the best time to visit Emerald Cave and how to get there.

These historical morsels help non-outdoorsy types understand what river lovers lost when Glen Canyon and the Colorado River were slowly drowned by Lake Powell throughout the 1960s and 1970s.

It's the second year in a row the Colorado River has topped the list from American River, this time for ecological threats in the Grand Canyon.

These historical morsels help non-outdoorsy types understand what river lovers lost when Glen Canyon and the Colorado River were slowly drowned by Lake Powell throughout the 1960s and 1970s.

Smallmouth bass have plagued the upper Colorado River Basin for decades, impacting numerous native fish species, but were only detected downstream of the Glen Canyon Dam in 2022.

Allowing the Colorado River to flow freely through Glen Canyon was a radical idea in the 1990s, but the opposite is true today.

From Horseshoe Bend to Grand Canyon's Mather Point to the Chiricahua Mountains, these are the Most Treasured Views in AZ. Here's how to plan a trip.

It's a place both beloved and hated after its creation three generations ago — by damming the Colorado River — obliterated a transcendent natural landscape with water hundreds of feet high.

Aerial image of Glen Canyon Dam, a concrete arch on the Colorado River. Water levels are at their lowest since the 710-foot-high dam filled to capacity in the early 1980s.

After months of stalemate, glimmers of hope have emerged for consensus on a new plan to manage the shrinking Colorado River.