Rocky Mountain National Park rangers in Colorado have rescued a Quebec man, Samuel Frappier, who was stranded on a mountain ledge 4,000 metres high.​

It took 28 rescue workers to reach the ledge where the 19-year-old was stranded on Longs Peak. He was flown on Wednesday evening to the landing zone at Upper Beaver Meadows in Rocky Mountain National Park and then taken by ambulance to Estes Park Medical Center.

Rescued climber Samuel Frappier

Samuel Frapper says it was "terrible' waiting on the ledge and he wasn't certain he would make it out alive. (CBC)

Frappier contacted park rangers with his cellphone Tuesday night, telling them he got stuck on Broadway Ledge as he was descending from the summit of Longs Peak, about 120 kilometres northwest of Denver.

Officials in Colorado say he was climbing with a friend, but the two became separated during their ascent.

Frappier was descending when he became stranded on Broadway Ledge and called for help from his cellphone.

“He is in an extremely precarious location on the east face of Longs Peak at roughly 13,000 feet in elevation. Samuel did not report any injuries but indicated he could not go up or down,” officials from the Rocky Mountain National Park said in a statement.

The ledge, about 4,000 metres high, can receive wintry weather including significant snow and ice.

“Fortunately there was no moisture overnight.…The young man is reported to be physically fit, but has no technical climbing equipment and is an inexperienced mountaineer. He was not prepared to spend the night,” the statement said.

A technical rescue team arrived on site Tuesday night to set up.

During Wednesday's operation, workers dealt with hazards such as falling rocks and ice.

Search and rescue personnel will be flown out as soon as daylight and weather conditions allow.