We ran across this unique natural bridge while hiking in the mountains near Nelson. Here in southern Nevada, stone arches are a dime a dozen (BTW: a great arch can be found at one of our other caches, Sunrise Surprise). Arches are formed by the erosional effect of wind, water and ice. Natural bridges, on the other hand, are created by flowing water. They are considerably rarer. The Techatticup Wash cut this one about 8 miles above its confluence with the Colorado River in Eldorado Canyon.
Follow US 95 about 10 miles south of Railroad Pass and turn left on paved highway 165 toward Nelson. There is a small parking area at the high point on the road. A dirt road leads north from there but it ends at a clearing after only 300 yards. From the clearing, hike up the hill (where it looks like the road continues). At the crest of the hill a single-track trail leads down that side of the divide to several arroyos that all converge near the bridge. Pick a wash (any wash) and follow it a little less than a mile through the cleft in the mountain.
You'll run into a few rock scrambles that were especially fun when we placed the cache on the day following the most rain this area has ever recorded in the month of December! The washes were running with hundreds of tiny waterfalls, and there were deep pools to work around under the bridge.