Four climbers have been rescued after spending three days stranded at about 13,500 feet on the north side of Mount Rainier in Washington state, the National Park Service said Thursday.

The men were spotted signaling for help Monday afternoon by a reconnaissance helicopter. They were unable to continue the climb up the mountain, about 75 miles southeast of Seattle, because of high winds that blew away or destroyed their tent and other equipment. The difficult conditions also prevented a rescue by helicopter.

At about 9:15 a.m. Thursday, a helicopter was finally able to land in the saddle between Liberty Cap and Columbia Crest during a window of good weather, according to the park service. By 10:15 a.m., the climbers were off the mountain.

Rangers were able to confirm the identities of the four men as Yevgeniy Krasnitskiy of Oregon, Ruslan Khasbulatov of New Jersey, Vasily Aushev of New York and Constantine Toporov of New York.

Vasily Aushev, Kostya Toporov, Ruslan Khasbulatov and Yevgeniy Krasnitskiy were rescued from Mount Rainier in Washington state. via Facebook / LinkedIn

All four, who were suffering from frostbite and cold exposure, were being released from Harborview Medical Center in Seattle, a hospital spokeswoman said Thursday night.

They began their ascent from White River Campground on Friday, and Mount Rainier's Communications Center received a 911 call on Monday reporting that the climbers had been stranded.

Efforts to reach the men by air throughout the week were thwarted because of high winds, the park service said. Rangers prepared numerous contingency plans, including air and ground rescue options, to implement Thursday if the opportunities arose.

Even an Army Chinook helicopter from Joint Base Lewis-McChord was unable to reach the men twice on Tuesday, first because of cloud cover and then because of the wind, it said Wednesday.

The challenging, technically dangerous Liberty Ridge route is the same one where Arleigh William Dean, 45, of Alaska was killed and two other hikers were injured when they were caught in a rockfall May 29. Three other hikers were uninjured.