Lost vintage baseball card collection from the 1980s in a black leather folder near Horseshoe Lake Park, Brainerd.

I lost my treasured collection of vintage baseball cards, all from the 1980s. I believe I dropped the folder while walking around Horseshoe Lake Park in Brainerd. There are about 30 cards featuring iconic players like Bo Jackson and Ken Griffey Jr. The folder itself is a black leather with some wear and tear, and inside, there's a specific top loader for a card signed by Derek Jeter. If anyone finds it, I would be so grateful to have it back.