SPRINGDALE – An unidentified male of unknown age died in Zion National Park Monday, and the National Park Service said the cause of death remains under investigation.

According to a news release, Zion National Park received a report of an unresponsive hiker at Scout Lookout. Rangers working at Scout Lookout immediately responded and performed CPR. Additional rangers hiked to the patient with medical equipment.

Rangers treated the patient, but after nearly an hour and a half of administering emergency medical care, medical control gave the order to terminate further efforts, the news release said. The park consulted with a doctor (medical control) and the patient was pronounced dead.

The West Rim Trail, which was temporarily closed for rescue operations, is now open.

Zion National Park’s response involved over 33 individuals, including search and rescue team members, dispatchers, emergency medical technicians, paramedics, law enforcement and other NPS personnel, the news release said.

The Washington County Sheriff’s Office, Utah Office of the Medical Examiner and the National Park Service are still investigating the cause of the man’s death.