North Yorkshire Police is appealing for witnesses and information about a male exposing himself at The Mere in Scarborough.
It happened on the disused track, between the Mere and the Railway tracks at 3.45pm on Tuesday and involved a white male, around 18- 25 years old, slim build, with straight dark brown hair down to his jaw line, with a block of red dyed hair on the left side.
The man also had heavy stubble and bushy eye brows.
He was wearing a green parker jacket with a hood that did not have any fur lining.
Anyone with information that could assist the investigation should contact 101, select option 2, and ask for Officer 1249 Hazlewood
If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.
Quote the North Yorkshire Police reference number 12150177087.