Note the logs jutting out from the walls. Pretty incredible. Above the highest log you can see the remains of a small wall very high above. They must have been crazy to be up there, even with ladders, if they had them. It was at least another 30 feet above us after we climbed up to the base level of the ruin. This picture was taken looking almost straight up.
It was so cold the night before our water jugs froze solid. In our haste to leave camp we forgot water. Fortunately up the canyon later in the day at much lower elevation we found water to filter. Yummy.