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 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.

A 63-year-old woman was found a quarter mile away from her vehicle. The investigation indicated she was returning to the trailhead when she collapsed.

The man was reported as unresponsive near Cedar Ridge on the South Kaibab Trail -- approximately one and a half miles below the canyon’s rim -- shortly before noon. Bystanders r

A 67-year-old Texas man died Tuesday at the Grand Canyon after abandoning an attempt to hike down to the Colorado River. He turned around and began ascending toward the rim before he was found,