Done it many times.

It's short because it's straight the hell up! The trail is so steep at one point (Hell's Half Mile) that you can easily lean just slightly forward and touch the trail in front of you.

The last part of the trail is actually bouldering, and if you make it to the top, keep focused on where you are at all times - there are some enormous fissures up there, and it is treacherous if it is wet. This used to be our initiation hike for anyone wanting to join our hiking group.