Corkscrew Peak was a hike that my sister Tiffany first embarked on in the Spring of 2010. She had traveled to Death Valley as a volunteer with her college Chico State as part of their alternative Spring Break program to assist the park. On her day off from volunteer work, her group attempted a hike up Corkscrew Peak. They were only able to make it up about halfway, but she seemed to really enjoy the hike. A year and a half later in December 2011, I attempted a hike of Corkscrew Peak. I had heard that there were two routes to the summit, one relatively easy in difficulty and one medium to hard. We decided to try both by hiking Corkscrew Peak as a loop. First, we took the easier route up, following a side canyon from the Round Boulder marker to the rock cairns directing hikers onto the ridge. Once on the ridge, a well-used trail continued all the way up to the summit. Along the way, we passed Keyhole Rock, which is a natural arch formation about 10 minutes below the summit. Looking around online, I could see that various hiking groups have given the arch a variety of different names. I've decided to use the name Keyhole Rock, which I came across in one of the previous trip reports that I read. Once we had reached the summit and returned to Keyhole Rock, our loop began as we took the Class 3 scrambling route back down. I must say, I did not enjoy the route between Keyhole Rock and the saddle far below it (as shown on the Google Earth map below, which you can click on to enlarge). The route was nasty, very steep, and full of loose scree. We had to work our way carefully and slowly around some cliffs and it took the enjoyment out of the hike. Once we were on the saddle, though, we were able to follow another trail. The trail led us past a square hole in the ground (similar to the one we found at the base of Lower Death Valley Butte), on to the Spring (where we saw a group of 6 Bighorn sheep in close proximity before they took off running), and then down a ridge to the wash below. Being that we did happen to run into the Bighorn sheep, we were very happy that we had done the hike as a loop and put up with the harder terrain. And the views from the top of Corkscrew Peak were outstanding. Our hike took place on December 4, 2011.