Police are investigating a report of a man assaulting a woman at the Moss Grove Hotel, Grasmere at about 7pm on July 7.
There were no injuries. The suspect is described as a white man, aged about 28, with dark, curly hair – wearing a dark Calvin Klein jumper.
A Cumbria Police spokesman said: “Officers are particularly interested in speaking with a person who may have helped the woman during the incident or immediately afterwards.”
Anyone with information can contact PC 2400 Hill on 101 – or Crimestoppers anonymously on 0800 555 111, referring to incident 175 of July 7.