Along the North side of the basalt wall of the canyon are several house size basalt rocks. The one where this cache is hid is more like condo size. Fun area to explore. After hiding cache and leaving I spied some climbing rings attached to the outside of the western most rock of the corridor, so it maybe an occupied area at times.
Enter corridor from North. Coords could be sketchy because all the rocks. When you step in over the rocks at entry you will see a crack on the left. You are at cache site.