The incident was reported shortly after 8:30 p.m. along Burbank Boulevard near Woodley Avenue, where the victim was going for a run.
Authorities said the woman was approached by a man with a knife who robbed her of her cellphone, threw her into tall bushes and told her, "If you scream, I'll kill you," according to Los Angeles police.
The victim feared she was going to be raped and fought back. Police said the suspect kicked her several times and threw her over a fence before fleeing on the bike path.
The woman suffered only a small cut on her hand and was not hospitalized.
Police later released a sketch of the suspect.
He was described as a Hispanic man in his 30s with black hair, brown eyes and a "scruffy" beard. He stands at 5 feet, 5 inches tall and weighs approximately 180 pounds.He was wearing a black hooded sweatshirt and black sweat pants.
Anyone with information on either incident was urged to contact Los Angeles police. Anyone wishing to remain anonymous should call L.A. Regional Crime Stoppers at 1-800-222-TIPS.