Kitti Boonnitrod/Getty Images(NEW YORK) American ski mountaineer Hilaree Nelson is reportedly missing after attempting to ski down Manaslu in Nepal, North Face, her sponsor, confirmed to ABC News. Nelson was on the eighth highest peak in the world along with her partner, Jim Morrison, when she went missing just below the summit, North Face said, according to reports. They had reached the true summit late Monday morning, Outside magazine reported the managing director of the guiding company they were with said. The Himalayan Times reported eyewitnesses said she fell into a crevasse. At 26,781 feet, Manaslu is a difficult peak for rescue efforts. Further hindering efforts is bad weather on the mountain, according to the Himalayan Times and Outside. This comes as an avalanche caused tragedy lower down on the mountain. One person was killed and 14 were injured, according to The New York Times. Chhang Dawa Sherpa, a director at Seven Summit Treks, wrote on Instagram that the avalanche too