Inspector Symonds urged anyone who thought a crime might have taken place to contact police rather than posting on social media.
"If you don't know something is a fact, please don't tell Facebook. Tell us," he said.
Anyone who felt concerned or threatened, including by behaviour on a walking track, should call police immediately. Police would rather turn up and find an innocent explanation than find out too late about a serious incident, he said.
Despite the apparent lack of substance behind the rape rumour, police would boost their presence in the Rainbow Falls area.
Mr Symonds said there did seem to be a real issue with the behaviour of some men, which he described as "boorish, rude and ungentlemanly".
He called on Northland men to consider the way they treated women, and how they would feel if was their wife, mother or daughter who was subjected to rude comments.
Some years ago Kerikeri was similarly consumed with rumours of a rape on the Domain at a park. Again, no complaint was laid and no evidence was found.