The woman said she was jogging in the 5200 block of South J Street when a man with a knife came up to her and forced her into a nearby alley. She was able to get away.
The suspect is described as a Hispanic man with a mustache in his mid-20s, about 5 feet 9 inches tall, weighing about 170 pounds. He was wearing a black hooded sweatshirt, checkered shorts and corduroy slippers.
If you have any information that could help investigators, you're urged to call Oxnard police at (805) 385-7740.