A Glendora woman fell 1,000 feet to her death Sunday morning in Zion National Park in Utah, park officials said.
Nancy Maltez, 55, was at the top of the Angels Landing trail with her husband and three children, age 14 to 20, when she fell off the vertical sandstone cliff, said park spokesman Ron Terry.
She was killed instantly.
"Preliminary reports are that she stumbled," Terry said.
Terry said police dispatchers received a 911 call about the fall at 8:24 a.m.
Sheriff's detectives are investigating the death with the National Park Service.