The NPS recommends avoiding hiking the Grand Canyon's inner trails between 10 a.m. and 4 p.m., when temperatures are at their peak. Temperatures in the inner canyon can reach over 120 degrees Fahrenheit in the shade, creating "extremely hazardous conditions for hikers," the NPS said.

A hiker has died on the South Kaibab Trail in the Grand Canyon National Park while attempting to reach the Colorado River.

A 67-year-old man hiking in the Grand Canyon National Park died on a trail while hiking in extreme heat, which possibly caused hazardous conditions. The Grand Canyon National Park Service said that at about 11:50 a.m. on Tuesday, July 8, the Grand Canyon Regional Communications Center received a report of an unresponsive hiker.

A 67-year-old man from Texas has died while hiking the Grand Canyon, according to park rangers who are warning of extreme heat.

Join us on a breathtaking journey to explore the 25 greatest natural wonders of the Earth. From the massive, awe-inspiring Grand Canyon to the vast, wildlife-packed plains of the Serengeti, these iconic landscapes showcase the Earth’s incredible diversity.

Grand Canyon University will officially join the Mountain West Conference by July 1, 2026, setting the stage for a budding rivalry with UNLV as the league undergoes major realignment.

A Coconino County, Arizona health official confirmed a case of Hantavirus at Grand Canyon National Park. Hantavirus is rare, but can be fatal, spread mostly by deer mice, rat urine, droppings, and saliva.

Hantavirus is primarily spread by deer mice, which are prevalent in the Grand Canyon area. The virus can cause a host of serious, even fatal, illnesses such as hantavirus pulmonary syndrome (HPS) and hemorrhagic fever with renal syndrome (HFRS), according to the Centers for Disease Control and Prevention ( CDC ).