Poison ivy?

How did I manage to pick up a case of what I think is poison ivy (or one of its close cousins)? I haven't been hiking or wandering in any areas with a multitude of plants...

I have a feeling I can really blame this one on my camera. I've been wandering on my bike lately accompanied by at least one (if not two) cameras. If there is something interesting along the side of the road - a flower, a tree, an animal, anything that jumps out and grabs my eye - I have a tendency to stop for pictures. And I think nothing of leaning my bike up against a tree and walking off of the road (wandering through patches of green) to snap a picture. Hmm... I guess I need to be a little more careful of where I traipse.