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JUNEAU, Alaska — <\/span>Rescuers are trying to reach four climbers who fell on Alaska’s Mount McKinley, North America\u2019s tallest peak, the National Park Service said Thursday.<\/p>\n The climbers\u2019 conditions weren\u2019t immediately known following the fall, which was reported to Denali National Park and Preserve rangers overnight, and rangers were seeking a weather window to allow them to reach the area by helicopter, a statement from the agency said. The four climbers were part of a seven-person team.<\/p>\n The three others climbing attended to those who fell, and then returned to camp, the statement says. The fall occurred near Denali Pass, at about 18,200 feet (5,547 meters). The climbers returned to an area known as high camp around 17,000 feet (5,181 meters), the statement says. McKinley stands at about 20,310 feet (6,190 meters).<\/p>\n Park officials have been in contact with the three climbers, said Scott Carr, a park service spokesperson. He said additional information would be released \u201cif and when it becomes appropriate.\u201d<\/p>\n Over the years, many climbing injuries and deaths have occurred on the traverse between the high camp and Denali Pass, mainly resulting from unprotected falls, according to the park. <\/p>\n Park rangers and mountain guides install and maintain snow pickets \u2014 which are used to help build anchors for extra protection on areas like steep slopes \u2014 between the high camp and Denali Pass, the park says. Climbers are urged to have their own pickets in case the protection placed by rangers and guides is missing. <\/p>\n Weather conditions didn’t improve the way rescuers had hoped. Carr said late Thursday that conditions throughout the day had been variable, with low cloud ceilings and limited visibility, and that authorities were still awaiting an opportunity to safely fly. <\/p>\n “Helicopter operations will start when a weather window opens up,\u201d he said.<\/p>\n A typical climbing season for Mount McKinley begins in late April and continues into mid-July, according to the park. There were 516 climbers on the mountain as of Thursday, Carr said by email.<\/p>\n On Wednesday, two climbers as part of a separate incident were evacuated from the mountain by helicopter around 11 p.m., but the park service said it did not have additional information to share.<\/p>\n<\/div>\n