The woman was walking through Legion Park, 3200 West Hollywood Avenue, when a man approached her from behind and tried to force her off the path.
One report said the offender tried to force the woman into a nearby stairwell.
Prior to the incident at Legion Park, the woman saw the man hanging out near Lawrence Hall at 4833 North Francisco Avenue, said police.
The suspect is a male black in his 20s, he was wearing an orange shirt and knee-length short pants.
According to the last update, the attacker fled the scene southbound from the park.