A French tourist visiting Death Valley National Park in California died last week after he and a companion were stranded on a remote road as temperatures soared above 100 degrees, the National Park Service said on Friday.

The tourist, Pierre Michel Formosa, 68, and his travel companion, who was also from France, were headed on West Side Road on Aug. 17 when the car got stuck in mud near Queen of Sheba Mine Road, the National Park Service said in a news release.

The two men walked across the salt flats toward Badwater Road to find help. Temperatures reached 116 degrees, with little chance of finding shade.

After about 1.3 miles, Mr. Formosa was unable to continue walking, the Park Service said. His friend, whom the authorities did not identify, continued toward Badwater Road, where he was helped by a passing driver.

Mr. Formosa’s companion reported what happened just after 2 p.m., and Park Service rangers and an Inyo County deputy began a search. A California Highway Patrol helicopter joined the search and found Mr. Formosa about 1.5 miles from Badwater Road.

Mr. Formosa was pronounced dead at the scene, the Park Service said.

The Park Service did not immediately respond to requests for comment on Sunday. The Inyo County coroner, whom the National Park Service said would determine the cause and manner of death, did not respond to requests for comment.

The park is known for its extreme heat. The park’s website notes that summertime temperatures in Death Valley can reach as high as 130 degrees, with nighttime temperatures of up to 90 degrees.

The deaths of at least four hikers were reported in June at Grand Canyon National Park in Arizona from what appeared to be heat-related illnesses as temperatures reached triple digits, officials said.

On June 16, the authorities found a 67-year-old man and a 68-year-old woman dead on the North Kaibab Trail.

On June 12, a 72-year-old man died on the South Kaibab Trail, officials said.

An 18-year-old man died at the park on June 3 after he experienced what the authorities called heat-related symptoms.