Upper Hole-in-the-Wall Professional Review and Guide
"This interesting cross-country canyon trek has lots to see, from marine fossils to grand mountain vistas. Short canyon narrows, geologic wonders, plant species found only in Death Valley, and moderate bouldering add variety to this long loop in the Funeral Mountains.
At the upper trailhead you’ll find remnants of an old travertine quarry. There is another quarry just over the ridge to the north in a small canyon of red sandstone. The quarries produced building stone for the Furnace Creek Inn. From the upper parking area, hike east for about 0.4 mile to the end of the travertine ridge on the left. You might find pictographs in this area. At this point the basin becomes wider and seems strangely remote, despite its proximity to busy Furnace Creek. Plants of this Mojave Desert ecosystem include creosote, rabbitbrush, barrel cacti, and sweetbush favored by bighorn sheep."