Maybe you've read in the guidebook about the hole on Limestone rapid that "becomes a real monster" at higher flows. This photo was taken June 8 1996, when the stick in the park was reading about 4900 cfs. Here's a wider view. The hole blocks most of the right half of the river and is positioned at the bottom of the steepest part of the rapid, where things are happening pretty fast. You don't want to be out of shape, or upside down! To make matters worse, just downstream, on the same side of the river, is another big hole. The second hole usually isn't a problem because you've already moved left to avoid the first. That's good, because it looks even uglier.

There is a story about a boater doing Limestone at 6000 cfs with a couple of paddlers from out of the country, that as it turns out, didn't know about this hole. The first paddler moved left in time, but the following two did not, and got eaten. The paddler continued down the rapid, past the second hole, eddied out river right, got out of his boat, and ran 75 yards through boulders back upstream. As the story goes, the two paddlers were still in the hole, sans boats, and had to be pulled out by throw rope.

It is very easy to scout or portage Limestone rapid on river left.