Went up for a walk around after work to see if it'd be ride able this weekend. The only part even remotely usable would be the second half of warthog, if you were going clockwise.
And only that because it's basically 100% rock, and even some of them are flooded.
You can see some tracks where dumb asses have ridden, with 6 inch ruts and water flowing through them.
-Note: I didn't go up the mountain towards Rhino, where it "might" be somewhat drained from being up the mountain.
I wouldn't ride it unless you really want to piss people off.