A 31-year-old man went to get help when his stepson passed out during a hike at Texas’ Big Bend National Park, but both were found dead, officials said.

On June 23, the man, who was from Florida, was visiting Big Bend with his two stepsons, ages 14 and 21, and the trio attempted to hike the Marufo Vega Trail in 119-degree heat, the National Park Service said in a June 24 news release.

“The Marufo Vega Trail winds through extremely rugged desert and rocky cliffs within the hottest part of Big Bend National Park,” officials said. “No shade or water makes this strenuous trail dangerous to attempt in the heat of summer.”

Rangers received a call for help at 6 p.m. after the 14-year-old “fell ill along the trail and lost consciousness,” according to officials.

The boy’s older brother picked him up and began carrying him while his stepfather hiked ahead to get to his car and find help, the release said.

At 7:30 p.m., rangers and U.S. Border Patrol agents found the 14-year-old dead on the trail, according to park officials.

Half an hour later, the stepfather was found dead inside his vehicle, having crashed over an embankment at Boquillas Canyon Overlook, officials said.

The overlook is less than a mile away from the Marufo Vega Trailhead.

Officials did not comment on the condition of the 21-year-old survivor, but McClatchy News has reached out to NPS for more information.

“This incident remains under investigation,” the release said.

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