A group of 10 hikers in their 50s and 60s were traversing a path called the Little Jimmy Trail at an elevation of about 7,000 feet when cold, snowy conditions caused half the party to fall down a 70-degree slope, according to Michael Granek, a helicopter pilot with the Los Angeles County Sheriff's Department. Around 11:30 a.m., about an hour into the hike, a woman slipped and fell down the hill, Granek said. When a male member of the party reached out to grab her, the icy, steep terrain pulled him down as well, propelling both down 300 to 400...