I rode/walked Moonscape the other day and I'm not quite sure exactly where Doom is.........
I rode the trail until the first split.........ended up walking to the right ( I think) and it looped around ( tough climb/ downhill) and appeared to tie back in at some point.........looked ridable but tough of course.
This section is Doom.
However, I stayed to the left and came to the next intersection where a trail went off to the left and climbed a ridge where the option I rode was running parallel the entire way while the hard option went up and down this ridge...........the option had a TOUGH downhill with a decent drop off in the end......I walked it and one point of the trail appears to possibly be the highest point in the entire park??
This section is after Doom joins back in and is unofficially called No Dab Ridge.