There are three large species of Desmognathus found in Great Smoky Mountains National Park, Seal Salamanders, Black-bellied Salamanders, and Shovel-nosed Salamanders. I'm reasonably confident that this fellow is a Seal Salamander, but it's not inconceivable that I've identified it incorrectly. If you can confirm or deny, please send me email, and please tell me your reasoning.

Here's another adult. This one was under a rock right at a stream's edge, and was briefly willing to pose on dry land.

A colony of these salamanders was living in the splash zone where a thin stream trickled down over some wet boulders and formed a tiny thin waterfall about a foot high. They were remarkably hard to photograph, because they would jump quickly into the gaps between rocks when exposed, and then squirm away instantly. This first one was perhaps the smallest salamander I've ever seen.