Though I have not seen it, I'm told the Climbing cover shot is from Bill's Columns (of Bill Ramsey, who grew up nearby), the wall visible above the road to the east while crossing the river in Warm Springs. The "supercrack" described in this thread is on another similar wall downstream from Warm Springs and on the east side of the river. It is not on reservation land. Folks have been climbing here since at least the 80's as well though there was not much going on until about 4 years ago when many fixed anchors were installed. There has been some attempt to keep beta spread word of mouth and not have a published guide book. I can understand this POV as onsighting the cracks here, imagining FA's if only in my head, has been some of the most enjoyable climbing I've done in nearly 2 decades. However, I don't see overcrowding or overuse being an issue and I am happy to discuss the area with anyone who contacts me personally.
-Brett