Black Canyon and the one road that made me pucker up. We end up riding some odd ball roads from time to time, (generally dirt) and every once in a while you think dang I wish we hadn't went this way.... The East Portal Road had me sucked up tight to the seat by the time we made it to the bottom. You know we all see those signs that give the warnings and we look and go on? This had one of those signs and it said something along the lines of 18% grade next 10 miles. Yea ok and go on. Well about halfway down the rear brakes had faded to nothing, not sure if I was boiling the fluid of if the incline was steep enough that I was pulling air in the master cyl. I could come off them and let the motor work till I needed them and 4 or 5 pumps the pedal would return till I release it. I would do it again tomorrow, so don't let the talk discourage you. Just pay attention.