Of the unique rock formations you will encounter, all pay homage to Mount Elden's volcanic origins. One in particular, a narrow passage just 4 - 5' wide, is how the trail earned its name. According to this source, the peak was named after John Elden, "an early settler who arrived in the area in 1875," just prior to the founding of Flagstaff. "In 1887, his son was shot and killed, apparently as part of a dispute over the use of water at a nearby spring," of which Elden Spring was named in his honor. His son's gravesite can still be visited near the spring.

The trailhead for this hike is off of Highway 89, just north of town. As you pass the mall on the right, the Ranger Station is on your left, and the trailhead is your next left turn. Neither restrooms nor water are available at the trailhead, though there are plenty of nearby stores and gas stations should you need to stop on the way.

For those looking for a longer, more challenging hike, consider a trip up the rugged Mount Elden Lookout Trail, where you'll earn even more impressive views nearly 2,300 feet above town.

Sources: https://www.theoutbound.com/arizona/hiking/hike-fatman-s-loop