Go left off of Powderhorn and head down Diamond Lane til the first gate opening on the right.
This is an area not recommended unless you have good skiing skills and are up for the challenge.
In the Cirque area it is possible to find cliffs and trees all over the place, so be cautious with your line choice and keep an eye on how fats you are going.
It's a fun zone with steep terrain a nice perspective on the mountain and what it has to offer in terms of steep inbound terrain is great.
Enjoy this challenging black, and at the bottom you can catch the Summit access West trail and hop on Summit for a lap to the top of the mountain and more expert terrain.