New here, Looking for an ID on a snake for a case I'm working on?

[supercow]

I've been told it's possibly a garter snake;

Hopefully if I can get an ID on the snake I can find out at least the country the photo was taken in. I was told Infernalis might be able to shed some light on the matter?

Any help would be much appreciated (:

I'd post the picture but I'm not allowed as I'm a new member.