Authorities negotiated the surrender of an armed man near the Bluebell Mesa Trail at Chautauqua on Thursday night, forcing the closure of Flagstaff Road for about an hour.

The man, a 19-year-old military member from Denver, was "distraught" but not threatening anyone else, Boulder County Sheriff's Office Sgt. Brian Zierlein said. The man's name has not been released.

Officers first became aware of the situation at about 7:30 p.m., when they responded to a report of a possibly suicidal man with a rifle on the trail. Zierlein said they were able to contact him by cell phone, convincing him to surrender the weapon. He was located shortly thereafter and taken into custody.

Just before 8:30 p.m., officials gave the go-ahead to reopen Flagstaff Road.

During the incident, Zierlein said, officers did their best to usher Chautauqua visitors out as quickly as possible.

"That's about the best evacuation you can do in a park that size," he said.

The man will be charged with a city parks violation for having a firearm on the trail, but he will not face any criminal charges. After officers took him into custody, he was transported to a hospital "to get the help that he needs," Zierlein said.