South of Old Faithful, a tiny stream runs beneath the Grand Loop Road—thousands of tourists drive over the little bridge every single summer day.
A trail generally follows the stream on its gentle course to Shoshone Lake. If you walk the trail, you might occasionally see a tiny brook trout finning in a deep, dark corner of the creek. More likely, if you’re not an angler and staring keenly through polarized lenses through clear water isn’t really your thing, you might notice a fish dart for cover as your shadow crosses the stream.