Lost - Backpack - Potlatch Hole parking Lewiston

I managed to set my backpack down by the car and forgot to put it in before I left at about 1pm. Got back to the pull off about an hour later and it was unfortunately gone. I am hoping that someone on here picked it up or knows the person who did. It mostly has fishing supplies, but also a pair of my glasses and some other items that would be difficult to replace. Thanks,