'Ol Hoss is an advanced trail that tops out just over 4000 ft. There are mandatory drops/obstacles; alternate lines are more difficult than the main line. Expect tight climbing switchbacks also.
It's way the heck up there...the ride to the top is over 4.5 miles, with an elevation difference of 750 ft. from the parking lot. Access this trail from Boat Rock
Trail, and follow it in a clockwise direction.