The trail rating depends upon your adaptation to altitude (>10,000'). If you're adapted it's a B- and you'll probably do this in conjuction with Mountain View Trail. (Of course you've biked up from Mammoth Lakes). If this is your first day it's an A. The trail is an out (up) and back (down) doubletrack with a smoothness unique to Mammoth.

The downhill is unbeatable for speed and whoop-de-doos. Remember to pace yourself on the climb.