One spring showed traces of several pharmaceuticals, including an antibiotic, an antifungal, an anticonvulsant, an antidepressant, and a diabetic drug. Such contaminants could pose a threat to the canyon’s already fragile ecosystem.

A new research project suggests the pioneers of 1924 might have had better equipment than you think.

Rescuers battled high winds to reach the surviving climber, who spent several hours on a precarious, rocky ridgeline.

A half-mile-long slackline was hung across Telegraph Canyon, a recreational area located about 60 miles east of Phoenix in the Sonoran Desert.

The triathlete went missing while swimming off the coast of California during her weekly swim club meeting. Eyewitnesses report having seen a shark in the water shortly before her disappearance.

At age 85, when most are enjoying retirement, the civil rights activist began serving as a park ranger in California. For the following 15 years, she continued in the service of public lands, giving historical talks and tours.

If passed, the Utah Republican’s proposal would have rescinded legislation that protects and maintains the boundaries of national parks as federal lands. Yet Senator Mike Lee told Outside, “selling national parks was never on the table.”

Record rainfall, flooding, and landslides have collapsed major highways, triggered mass evacuations, and left national park gateway communities in Washington and Montana in a state of crisis.

As bear attacks hit record highs in Japan, one professional snowboarder filmed himself out-carving a charging black bear.

A 20-acre acquisition connects this desert national park to a nearby preserve, creating a vital wildlife corridor in the heart of the Sonoran Desert.

Cost of living in California near Yosemite National Park is notoriously high. Even so, federal officials are slashing wage rates for blue-collar workers, sparking outrage from the local union.

Utah officials have posted a $3,000 reward for information leading to the capture of a person who reportedly stole a 1,700-year-old skull from an ancient burial ground near the high-desert town of Kanab.

In the past, Steamboat Geyser in Yellowstone National Park regularly shot water over 300 feet into the air. But the feature hasn’t erupted in the better part of a year, and scientists aren’t sure when it will again.

A private meeting of Utah officials highlights a growing rift over how to manage crowding at the state’s most popular national park sites.