Ontario Provincial Police are asking for the public's help investigating a sexual assault on a trail in Collingwood.
Police say the incident occurred on Wednesday night around 11:30 in the area of Huron and Niagara streets.
The suspect is described as male, between 17 and 20 years old, approximately five-foot-four, with a medium build.
He was reportedly wearing all-black clothing, a black full-face balaclava that left only his nose exposed, and black-framed mirrored ski goggles.
Police say the suspect was riding a dark-coloured mountain bike with wide, aggressive-tread tires. He appeared to lean forward while riding.
Investigators are asking anyone who may have information about the incident, or who was in the area at the time, to contact the OPP non-emergency line at 1-888-310-1122.
