First responders received a call just before 8 a.m. from a man who was part of a hiking party that saw the woman fall what he believed was 1,500 to 2,000 feet from below the summit into Pierre Lakes Basin, the Pitkin County Sheriff's Office said. The witness said that the woman had fallen after a rock she was trying to hold onto gave way, according to the sheriff’s office. Officials described the area as "treacherous," with "loose, rotting terrain" that can create unstable and dangerous conditions that can lead to serious injury or death. Rescuers learned of the woman’s...