21.   Clumps of ponderosa pine and Douglas fir clung to the canyon walls.

22.   Emergency water and food still are kept in ancestral caves along the canyon walls.

23.   Even if it means walking backward down a steep canyon wall to do it.

24.   For rooms with status as well as a view, the deserted penthouses along the salmon-toned canyon wall are hard to beat.

25.   Fouts would have to back up about an eighth of a mile or so along that winding trail and its unforgiving canyon walls.

26.   Gathering these tender creatures is difficult because they are often located on steep canyon walls that are hard to reach and because even the slightest abrasions can kill them.

27.   He frames his son with the small trout, the roaring white water, the shadows on brown canyon walls.

28.   He had climbed to a perch on a rock outcrop on the canyon wall.

29.   Here, one can walk a mile or more through the woods, then along a boardwalk anchored to the canyon wall just above thundering rapids to secluded waterfalls.

30.   If the canyon is to be seen at all, see it at the beginning or close of the day as the colors change on canyon walls.