There are a variety of routes to Corkscrew's summit. Here is a description of the easiest which does not seem to be in any guidebook. All GPS coordinates are UTM NAD27.
Park along Daylight Pass Rd. A good spot is near the signed service road at 502470 4064703. Do not hike directly towards the peak. Instead, hike to the right of the peak through a very wide wash to where it splits at about 502122 4067655. There is a large light colored boulder here that is visible on Google Earth. Take the left fork. Here is a picture of the split. The boulder is at the left.
Hike up the left fork for a few hundred feet. It quickly narrows. On your left, you will come to a small gully marked by numerous cairns.
The gully goes a short distance and dead ends. On the north wall of the gully, you will see a use trail leading up and out. Here is a picture looking back to the gully. You can see the wash you entered in the upper center of the picture and the use trail is obvious.
From there, follow the use trail (faint at times) and many cairns up a ridge to a rock band. The use trail passes through the rock band at an easy point. Above the rock band, the use trail is easy to follow to the summit. The route is pretty much class 1.
