Into the Wild

From the text:

For most of its short length, Davis Gulch exists as a deep, twisting gash in the slickrock, narrow enough in places to spit across, lined by overhanging sandstone walls that bar access to the canyon floor. There is a hidden route into the gulch at its lower end, however. Just upstream from where Davis Creek flows into Lake Powell, a natural ramp zigzags down from the canyons west rim. Not far above the creek bottom the ramp ends, and a crude staircase appears, chiseled into the soft sandstone by Mormon cattlemen nearly a century ago.