Officers said the woman, a staff member at Leeds Metropolitan University, was sitting in an outbuilding when she was approached on Sunday night.
A man entered the outbuilding, off Churchwood Avenue, and attempted to rape her.
The woman raised the alarm, and the man ran away. She was taken to hospital suffering from minor injuries.
Police urged anyone with information about the attack to contact them.
The man is described as aged between 20 and 30 years old, about 5ft 7in tall and had mousey-coloured hair.
He was wearing a grey tracksuit and was believed to have been riding a white BMX bike.
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