LIGHTNING struck and killed an Idaho woman and injured five others as they were climbing the 4131-metre Grand Teton.
The thunderstorm moved in while the climbers were on Grand Teton's Exum Ridge.
Park spokeswoman Joan Anzelmo said Erica Summers, 25, her 27-year-old husband Clinton and four others were among 13 climbers who had divided themselves into four groups for the climb.
Each group had at least one experienced climber.
"They all felt rain sprinkles and they didn't sense a big storm," she said."
In fact, they only saw two major lightning strikes and one was the one they were struck by."