The Bridge Spring Trail makes a great winter hike to a rare natural bridge in the Eldorado Mountains, south of Boulder City and near the small town of Nelson.
This is a good, moderately strenuous hike for the entire family, as long as everybody can hike about 2 miles round-trip and do some rock scrambling. The trailhead is at about 3,510 feet; therefore, it will likely be about 5 to 10 degrees cooler than in Las Vegas. You will lose about 200 feet in elevation on the way to the bridge.
Natural bridges are rarer than arches. Arches can be formed by various geological processes, but natural bridges are formed by water and either span a waterway or did so in the past.
From the unsigned parking area, follow the gravel road east to the end, about 0.2 mile. Head toward the ridgeline on the faint, but obvious, trail. The trail gently undulates for the first quarter-mile, and then you will drop into a well-defined wash that will serve as the trail for the rest of the hike. After you drop into the wash, you will go left or downstream. Be sure to turn around and remember where you entered, as it can be confusing on the return.
After about a half-mile you will come to a giant boulder, about 25 feet tall and 15 feet wide. It seems out of place and appears to defy gravity, as it looks like the boulder might fall if you pushed it. Just after this you might start to see water, and you’ll find more vegetation, such as healthy and large scrub oak.
Wildlife find this a reliable water source, so one might see bighorn sheep, mountain lions, bobcats, chuckwalla lizards or rattlesnakes or, more likely, their tracks. One interesting and rarely seen creature that likes this wet, rocky area is the Gila monster, a poisonous lizard. They should be going into hibernation , but come springtime they will be back out. They are often 1 to 2 feet long and black with splotchy patterns in pink, orange or yellow. Gila monsters are a protected species, so if you are so fortunate as to see one, leave it alone.
The wash gets rockier and the vegetation becomes quite dense as you approach the bridge. To get a good look at it and stand underneath, you’ll most likely have to do a bit of bushwhacking. It seems easier to do that along the left side. Watch the kids in here, though, as there are some drop-offs and some places where you’ll have to scramble over the rocks.
The bridge spans over the canyon about 30 feet across and the opening is 15 to 20 feet high. If you are up for more adventure and more difficult scrambling, over large boulders, you can hike past the bridge down the drainage. For experienced hikers and climbers only: You can do a tricky climb up on the left-side cliff and take in some far-reaching views. You can see down Eldorado Canyon to Lake Mojave and even see Mount Tipton, just south of Dolan Springs, Arizona.
On your return, if you have the time, there are some interesting spur canyons worth exploring. Most are short, slot-like and boxed in and are especially fun for children.
From Las Vegas take U.S. highways 93/95 south about 25 miles and stay right to continue south on U.S. 95 toward Searchlight. Drive about 9 miles and turn left on Nevada Route 165, toward Nelson. Drive 9.4 miles and go left onto the unsigned gravel road for parking and the trailhead. Park here, or with a high-clearance vehicle drive about 0.2 mile on the gravel road to a secondary parking area and trailhead.