Lost black North Face backpack near the north side trails of Griffith Park containing personal items including a notebook and spare headphones.

I lost my black North Face backpack while walking my dog near Griffith Park in Los Angeles. It has some personal items inside, including a small notebook and a spare pair of headphones. I last remember having it on the north side of the park, near the trails. I'm really hoping someone might have seen it or picked it up. Thank you!