This trail starts and ends where B Trail magically becomes D Trail. Head up the side of the hill a 0.5 miles east, then enjoy a bit of a glide slope for another 0.6 mile with some tight switchbacks that almost merge with D Trail at the bottom. Now you have a short climb up and out of a side gully.
From here it is all downhill to the overpass with some reasonably wide switchbacks so you can keep your speed up. At about the 2.0 mile mark you'll get to cross over a very well-built overpass that would be spectacular if you could hit it hard enough to get some air. Sadly there is no runout below the overpass and you are forced to lock it up on the landing just to get slowed down enough for the ridiculously tight left turn at the bottom. From here you have a short 0.7 miles ride back up to where B Trail magically becomes D Trail.