A man and his co-worker were walking on a trail when “dislodged rocks,” including a half-ton boulder crushed him.

A former youth pastor was charged with murdering his wife 20 years after her suspicious fall from Angel’s Landing in Zion National Park.

Tourists visiting a volcano in Guatemala got more than they bargained for when it began to erupt, spewing hot ash and debris into the air.

A man who was hiking in northern California this past weekend is currently missing, and officials are asking the public for help.

A rescue effort saved more than one life when two groups of hypothermic hikers in the White Mountains called for help on the same night.

Visitors to Yosemite National Park’s Nevada Fall witnessed a person go over the edge of the waterfall. NPS confirmed there was an incident.

A mountain biker riding on the Dome Trail near Anchorage, Alaska, suddenly came upon a brown bear on the trail, and it charged at him.

An alligator grabbed an employee at a reptile center in Utah by the arm and wouldn’t let her go. Watch the terrifying moment here.

Three hikers died from heat-related illnesses in the Grand Canyon within the span of a week, proving just how deadly extreme heat is.

A teenager survived a terrifying bear attack on a Washington hiking trail. He’s speaking out about the experience.