Golden retriever Scout, red collar, near CSU

I lost my golden retriever, Scout, yesterday around 3pm near the CSU campus, around Mountain Ave and Prospect Rd. He's a friendly 60-pound pup with thick golden fur and a bright red collar. He has a small white patch on his chest and a tiny scar behind his right ear from a run-in with a bush. I called him, but he wandered toward Old Town and disappeared by the north gate; I’m really worried because he’s more skittish around strangers. This dog is my best friend and, honestly, I miss him a lot—if anyone found him, please reach out.