A Jackson man died Sunday while hiking near the top of Teton Pass despite a rescue effort that included as many as 25 people.

Teton County Sheriff’s Office Undersheriff Bob Gilliam said the death “appears to have been a medical situation.” Teton County Coroner Kiley Campbell could not be reached by press time.

The name of the dead man was withheld by deputies pending notification of relatives.

Gilliam said the man and a woman believed to be his girlfriend had reached the summit and “started back down, were about a third of the way down, and he started having some medical problems.”

The woman called 911 from the slope of Mt. Glory. The first person to respond, a county deputy, then had to find the man and woman, who were not in sight from the highway.

As the deputy headed uphill, the woman was told by a dispatcher to shout so the deputy could find her in the trees.

“He was hiking up,” Gilliam said, “and, for lack of a better way to put it, he was sort of vectored in by dispatch, who was on the phone with the victim.

“As the deputy got closer, she started yelling so he could see her.”

The deputy began giving the man first aid, Gilliam said,  and was “soon joined by some other hikers who came by, including a doctor.”

Two paramedics hiked up the slope, and Teton County Search and Rescue, with the help of a Grand Teton National Park helicopter, landed another doctor at the site.

The first call to 911 came in at 12:09 p.m. Search and rescue was on the scene by about 12:40. A sheriff’s department press release said the man was never responsive to medical treatment, despite the fact that help arrived quickly given the remoteness of the incident.

“He had good medical care there, and it was there quick,” Gilliam said. “They worked very hard trying to save his life.”