The trail starts at the northern end of the Red Cliffs Desert Reserve. You'll make an initial singletrack climb up some fairly buff switchbacks. At 0.5 mile, the trail reaches a doubletrack with a pipeline on the far side. Find the continuing singletrack trail on your right, just across the pipeline. Now the climb gets a bit more technical, with frequent basalt rocks to negotiate.
At mile 1, the trail reaches the Broken Mesa Rim. It twists through juniper and brush, with more basalt boulders to keep things interesting. At mile 1.6, the downhill begins. The trail twists for 5 miles towards the edge of the cliffs at Washington, first in juniper and rock, then on the mesa-top.
At the edge of the mesa, you'll drop at a 20% grade through the broken lava. It's not as bad as it looks. Nothing too tricky here; just hang your butt back and aim the front tire straight down the trail. You'll be fine.