From Conant: "Dark lateral spots alternate with dorsal blotches throughout length of body. Belly: Yellow with faint traces of spots." All other Nerodia in or near your area have well marked bellies. As far as mountain habitat, it is amazing to me how cool a clime, especially cool water, these critters can tolerate. I have found snakes in water I would not enter without waders. I hope you are successful raising it. Nice looking snake.

~~Greg~~