An 83-year-old Renton woman out for a walk on the Cedar River Trail late Sunday afternoon died Monday morning of head injuries she suffered when hit by a bike rider, according to the Renton Police Department.

Velda K. Mapelli’s death was ruled an accident by the King County Medical Examiner’s Office.

She suffered fractures of her skull, clavicle, ribs and pelvis, according to the medical examiner, and had blunt force trauma to her head and torso.

Mapelli was taken to Harborview Medical Center in critical condition, where she was in the intensive-care unit. Her family reported to Renton Police that she died at about 11:30 a.m. Monday.

She was walking east on the popular trail along the Cedar River about a quarter-mile from Interstate 405 at about 4:50 p.m. when she was hit by a bike rider and fell to the ground. The accident happened near the Cedar River Dog Park.

The bike rider, a 57-year-old man, also fell to the ground and suffered minor injuries. He was treated at the scene by medic units. A second bike rider wasn’t injured.

According to police, as the bicycles began to pass her on the left, Mapelli stepped in front of them and was struck.

The police department’s Traffic Division is continuing its investigation, including

talking to witnesses.

“This is very, very sad,” said Renton Police Commander Paul Cline.

Cline said it’s not known how fast the two bike riders were traveling. The speed limit for bike riders on the trail is 15 mph. They are required to yield to walkers and pass on the left, according to the etiquette rules posted on a kiosk near the trail’s entrance.

“We don’t know if the rules of the trail were violated,” Cline said. If someone was reckless, then charges are possible, he said.

He can’t remember any deaths on the trail as a result of a pedestrian-bike collision.

Brad and Davina Jaggard of Renton, out walking Monday afternoon on the trail, were shocked to hear of the accident. They used to live in Seattle.

“I am always aware of my surroundings,” Davina said, including the wooded areas that line the trail.

Renton Police will send a patrol car or bike patrol to the trail if it receives a report of a rules violation. But response can be difficult because the trail is inaccessible in certain areas, he said.

Officers on bikes will patrol the trail during the summer. Some surveillance is done to ensure transients aren’t causing a problem on the trail.

“For the most part people who use the trail seem to be pretty well-behaved,” Cline said.