This is a challenge cache and IS at the posted coordinates.
There was a time when I didn't react to poison oak at all but a few years ago I started having a reaction to it. Oh man! That stuff itches! Now I avoid it like the plague. This challenge is to reward those brave enough to go after those caches. You may sign the log anytime but only claim your find after you have found 100 caches with the Poisonous Plants attribute.
I qualify to place this challenge by finding 367 caches as of this date with this attribute.