The large group hiked to the peak in the morning and as they headed down a group of two adults 22 and 53 years old and three juveniles decided to split off and take a short cut.
On the way down, the 53-year-old injured his leg and ankle and became dehydrated, Hadley said. The four others went for help but got lost.
After they called for help by cell phone, a Life Flight helicopter using cell phone coordinates located the four near some cliffs on the back side of the Ben Lomond Peak area and hoisted them individually off the mountain, Hadley said.
A search and rescue ground crew located the injured man with the help of a whistle he was blowing. Once he was found, the helicopter also hoisted him off the mountain.
By 10 p.m., the injured man was taken by private vehicle to McKay-Dee Hospital.
Hadley said the incident is an example of why hikers should "take water, take phones and stick together."
Basic hiking and outdoor skills would have averted the entire problem, he said.
"There were a few safety rules that were altered that resulted in this five-hour operation we did up there tonight," Hadley said.