An Ecuadorian member attempting to summit Aconcagua but developed severe bilateral toe pain after prolonged cold exposure at approximately 14,400 feet/4,390 meters. A field assessment determined second-degree frostbite affecting all toes, with blistering, numbness and significant pain that prevented walking. She received rewarming measures and medication at a local clinic before being evacuated by air and then ground transport to a hospital. There, the diagnosis of second-degree frostbite was confirmed, and she was observed for continued rewarming and circulation monitoring. She was discharged after stabilization.