Gold pendant necklace found near Grand Teton Visitor Center

I found a gold pendant necklace this afternoon around 2:15 pm behind the Grand Teton Visitor Center parking lot in Jackson, Wyoming. It's an 18-inch gold-tone chain with a small heart-shaped pendant that has a tiny ruby inlay, and the clasp is a spring ring. On the back of the pendant there's initials 'EM' lightly scratched. It looks like it might be sentimental to someone, so I'm hoping to reunite it with its owner.