The route starts at the Black Crater Trailhead. Getting here is described in the "Getting There" section.
The trail is pretty straight-forward. Follow the switchbacks up the north side (good view point of Mt. Washington, Three Fingered Jack and Mt. Jefferson about 1/4 mile into the hike on the left). From there the trail traverses the valley carved out and extending from the summit crater. It then heads west up to a shoulder. More switchbacks follow to the summit plateau of black cinders and a 30 foot summit crag (easy scramble to the top).
The trail is about 3.7 miles long and gains about 2500 feet of elevation.
If you have information about this route that doesn't pertain to any of the other sections, please add it here.