The Sierra Buttes are a spectacular set of glacier-carved pinnacles that anchor the northern end of the Sierra Nevada. A Forest Service fire lookout, still in use, was built on the topmost pinnacle and is accessed by three long and exposed flights of stairs. An open-grate catwalk surrounds the lookout, with the grate on the outward side suspended over a cliff several hundred feet high, the head of a glacial cirque. The views are obviously stunning, but those with a fear of heights may have trouble climbing the stairs, not…
