From Moab, head North on HWY 191, then turn left onto Potash Road. Drive 10.3 miles (0.3 miles past the Corona Arch TH) and park at the pull out on your right side. The parking area can fit about 10 cars. There is NO trailhead sign. Here's a driving map.
The parking area is on the right side (East) of Hwy 279 (Potash Rd). The trail begins by hiking through the tunnel, under the railroad track.
Though it looks small here, the tunnel is actually about 7-8 feet high, 4-5 feet wide, and roughly 150-200 ft long.
Having fun posing in the tunnel.
As soon as you exit the tunnel, you'll see the first and only sign for Jeep Arch - head left and up the short hill.
You'll hike alongside the railroad track and cut through sage brush. You should see a sharp right turn heading up another hill past an old barbed wire fence.
Enjoying the view of the massive red rock!
As soon as you pass the barbed wire fence, start keeping an eye out for cairns to guide you. The trail is a mix of slick rock, sandstone, and sand.
Eventually you'll reach another sign that says "Loop" - we chose to hike in a counterclockwise direction. The trail takes you to the right of that spire and around to Jeep Arch.
Hike up this small rocky area.
As soon as you turn the corner of that rocky area, you should see Jeep Arch to the left!
Charlie looks like he's up to no good here...
You should once again pass by the tall spire, this time hiking down right in front of it. Make your way back to the cars the same way you hiked in.
This isn't on the trail to Jeep Arch, but if you have time, stop along Potash Rd to view petroglphys. This is called "Bear Panel", and the paws are the size of my hand! This was near mile marker 6 or 7.
Jeep Arch trail map looking NE.