Double Arch Trail is a dead end, but despite that many people do the out-and-back hike to the beautiful arch in combination with an Auxier Ridge Trail #204
to Tunnel Ridge Road hike.
You drop fast to the base of the massive cliff line and then hike along beneath tower sandstone walls for most of the trail, passing under Double Arch before circling around the north end of the ridge and climbing up to come out right at the unique rock formation that this trail is named for.
The views of Auxier Ridge from the arch are amazing, and worth the trip out to Double Arch. Just make sure you save something for the climb out.