This species generally hatches in August, and this photo was taken in early August, so it is possible this one is only a week or so old. However, as JK over at Camera Trapping Campus pointed out, many species (plants and animals) were running a bit early this year, so it is possible that it is a bit older. Still a fairly young one though.
I've seen additional juveniles this week. They are a bit more stretched out now, and a lot faster. But I'm optimistic at least one was a sighting of this one growing up.
References:
http://en.wikipedia.org/wiki/Western_fence_lizard
Thank you JK with the help on ID