This is one technical trail, and your average speed will reflect that. As you enter the Rock-infested "gnarfest," start snaking your way through a bunch of obstacles. Your uphill & downhill Riding skills will certainly be put to the test. If you are a novice, this will NOT be a fun Ride.
You'll find the start of Debacle on Middle Stinger, just after (or before depending on your direction) a gas-line clearing. You'll see a TV sitting atop a bunch of large boulders.