Climbing rangers at Rocky Mountain National Park in Colorado were battling wintry conditions Wednesday as they tried to reach a 19-year-old Canadian stranded on Longs Peak.

Samuel Frappier, 19, from Quebec, and a friend were climbing the 14,259-foot peak Tuesday from the western side of Chasm Lake via Lambs Slide when they separated, park officials said. "Later in the afternoon, Samuel became stranded on Broadway Ledge as he was descending from the summit of Longs Peak. 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," park spokeswoman Kyle Patterson said.

Though Frappier was said to be in good physical condition, he had no technical climbing equipment and was not an inexperienced mountaineer, she added, and had no gear to spend the night. Above 9,000 on Longs Peak conditions were wintry, with "significant snow and ice" reported. Overnight lows dipped into the 30s.

Park rangers had been in contact with the climber Wednesday morning. Late last night, the initial park technical rescue team arrived at the Chasm Shelter at the base of the east face of Longs Peak to stage for an attempted rescue Wednesday.

"A significant technical rescue is taking place. There are currently 28 team members and rescuers involved in this incident. Park rescue team members are dealing with a number of hazards including active ice and rock fall," said Ms. Patterson.

There was no immediate word on the whereabouts of Frappier's companion.