Lost silver locket with a tiny heart charm near the Black Hills, South Dakota.

I lost my silver locket while hiking near the Black Hills in South Dakota last week. It has a tiny heart charm inside, and it has sentimental value to me as it belonged to my grandmother. I remembered taking it off to snap a quick picture of the great view, but somehow it slipped from my pocket when I packed up my things. If anyone finds it, I would really appreciate it back.