Lost black North Face backpack with blue zipper and patches containing personal items in Acadia National Park.

I lost my black North Face backpack with a blue zipper while hiking in Acadia National Park last weekend. It has a few patches on it from previous hikes and was holding my water bottle, snacks, and a camera. I retraced my steps but couldn't find it anywhere. I'm really hoping to get it back as it has some sentimental items inside.