The Chasm Of Doom a scramble, squeeze, craw and climb inside a granite maze amongst giant boulders. This secret set of tunnels and passageways is not for the faint of heart or the claustrophobic and It requires you to be comfortable climbing, scrambling and bouldering in the dark please exercise extreme caution. 

One of the most fun Active things you can do in Joshua Tree is the Chasm of Doom.  It takes a bit of finding but once you do it quite a bit of fun.  I suggest you find someone who has done the Chasm of Doom and asks them to take you.  Some time’s it’s hard to find your way alone.  I was lucky to find The Birth Canal the first time I went. Also, the downclimb can be a bit tricky without knowing where to go.

The entrance is located in the large bolder structure just to the left of the trail entrance for the Hidden Valley Nature Trail. 

Here’s a video of how to find the entrance.