there are actually 2 logs in entrance exam.
both on river left.
be heads up folks, they have been there all season but i have still seen a good boater have to flip over the bottom log, try to roll while up against that undercut rock. (ok i didn't see it, i was in the eddy below just waiting for him to come down... it's was just waterton after all)
"We should restore the practice of dueling. It might improve manners around here" -Edward Abbey