The incident happened around 12.50pm on Saturday October 13 within the park near Niddry Road.
A 41-year-old man was walking his dog in the area when he was confronted by a group of youths and a verbal altercation ensued.
At this time the victim was attacked from behind and sustained a number of wounds to his head, shoulder, hands and legs.
He was able to make off from the suspects and returned home before contacting and ambulance.
Officers are now urging anyone who can assist with their inquiries to come forward.
Detective Constable Grant Ross from Livingston CID said: “The suspects seemed to have intentionally targeted the victim and then subjected him to a violent attack.
“At this time we don’t have a description of the group and we would ask anyone else who was in the area and witnessed this incident to contact police immediately.
“Similarly, any passing motorists who may have relevant dash-cam footage of the attack, or those responsible
Those with information can contact Livingston CID via 101 and quote incident number 1895 of the 13th October. Alternatively, an anonymous report can be made to the charity Crimestoppers on 0800 555 111.