Golden retriever with red collar

I lost my golden retriever yesterday around 3pm near the Ashtabula Public Library on Jefferson Street, by the lake. He's a friendly 3-year-old male, about 65 pounds, with a bright red nylon collar and a small blue ID tag that says 'Harper.' He has a white patch on his chest and a tiny notch in his right ear. Last seen heading toward Harbor Park along Lake Avenue, tail wagging and sniffing everything in sight. He means the world to me—this dog is my hiking buddy and it's eating at me not knowing where he is. If you spot him, please drop a note here or message me through the email below.