Lincs Police are investigating the incident which occurred at around 6.20pm on Monday 25th May on Pingle Hill, Gainsborough.
An 18-year-old woman was walking down the hill when she was assaulted by a man near to the junction with the graveyard. She was not seriously injured in the incident but was left shaken up.
This man is described as around 20-30 years old, white, of large build, between 6’0” and 6’2” tall, wearing a black jacket with orange stripes down the sleeves, black tracksuit bottoms and white trainers.
Lincs Police are appealing for witnesses who may have seen anyone in that area around that time matching that description.
Further enquiries are ongoing and anyone with information that may help the investigation is encouraged to contact Lincs Police on 101 quoting incident number 367 of 25th May.
Alternatively call Crimestoppers anonymously on 0800 555 111.