Lost black Bose Bluetooth headphones with charging case near a park by the Columbia River in Tri-Cities.

I lost my black Bose Bluetooth headphones while walking in the park near the Columbia River in Tri-Cities. I remember setting them down on a bench to take a phone call, but when I got up to leave, I forgot to grab them. They come with a charging case and have a little bit of wear on them, but still work perfectly. I've been trying to retrace my steps, but no luck so far.