Police are appealing for witnesses following two incidents of indecent exposure on Tuesday April 19.
A woman was walking around Linlithgow Loch just after 5pm when she saw a man exposing himself before making inappropriate comments towards her.
He is described as white with a medium build and wearing dark clothing.
Officers then received a similar call from two other woman at Linlithgow Loch around the same time, who also reported a man exposing himself and behaving in a manner that caused concern.
The individual, described as being white, around 30-years-old, around 6ft tall, slim build, wearing sunglasses and carrying a helmet and had ginger hair with a scruffy beard, then made off towards the access road at the back of the loch.
Police believe the man, who had a prominent jaw line and was wearing a black leather jacket, a black round neck t-shirt and black canvas trousers, may have had the use of a motorcycle.
Officers are now investigating a possible link to a similar incident in the middle of March.
Anyone who can assist with their ongoing inquiries is asked to come forward.
Broxburn and Linlithgow Community Inspector Scott Robertson said: “This was a distressing experience for all of the women involved and we are actively trying to trace whoever was responsible.
“We believe the same person was responsible for both of these reported offences, and possibly a similar offence in March, and anyone who can help us identify him is urged to contact police immediately.
“In addition, anyone with any further information relevant to this investigation should also get in touch.”
Anyone with information should contact Police Scotland on 101 or Crimestoppers anonymously on 0800 555 111.