The drive to Inchworm Arch is fun, but it requires a 4WD vehicle or ATV to get to, as the road is deep sand. The arch itself was named by some Boy Scouts that discovered it, and it’s pretty self-explanatory. When you hike down into the canyon, you will see that the double arch resembles an inchworm crawling down the rocks.
We went to the arch on the same day we went to the Mansard petroglyphs, since the two sites are in the same area. We enjoyed the Mansard ride a little more, just because driving through the sand got to be tiresome. But I thought the hike to the arch at the end was worth the drive.
From Kanab, drive east 9.5 miles and turn left at Johnson Canyon Road. Drive on this road for 9.1 miles (keep an eye out for an old movie set from “Gunsmoke”) to the Nephi Pastures Trailhead on your right. There is a staging area where you can unload your ATV’s. Take road #556 for 8 miles, then turn right at road #558. Drive one mile and take the next road on your left. After another 1.5 miles, keep left at the fork. Follow this road until it ends, you will see a trail behind a “No Vehicles” sign. The hike is short, about ¼ mile, and you will see the arch. You can hike right up to it, my boys enjoyed scrambling over the rocks.
This route is in sun the entire way, so be prepared with water, food and sunscreen.