Here's a shot of our poison oak.

See, I know what it looks like but . . . I put the Sharpie in front of the vine on this tree to kinda give you an idea how good it grows down here. You'll notice the 'white' line above the pen, that's where I cut it with the chainsaw and that's why I now have it again. This particular vine is at least 3" across and 50' long.