O hole is downstream form A hole/Black bear hole. It is right near the big stone Lyons sign.
I've never seen this much water coming out of the diversion. Not much in the SV proper above it.
The hole looks fun for experienced boaters, but thrashy for kids/beginners; the big pool below O hole and the next one has good eddy lines and recovery area for beginners.
(seven two 0)-298-2242