At about 10:55 a.m., the the King County Sheriff's Office received a 911 call from a woman who said someone had fallen off of Rattlesnake Ridge. Medics and search-and-rescue personnel responded to the scene, said King County sheriff's spokeswoman Cindi West.
A friend of the victim told police she and the man had hiked to the top of the ridge. She was taking pictures of the man near a ledge when he slipped and fell as he was trying to jump to a rock.
At about noon medics found the man about 150 feet down from the ledge. He was pronounced dead at the scene.
The victim's name, age and hometown were not immediately released, pending notification of next of kin.
Other details were not immediately available, but West says the rescue crew will carry the body out.