How did you calculate the grade? Did the mapping site do it? I'm impressed if you did it! I used the Pythagorean Theorem and got 20.06%. If you had made a mistake and used the .13 miles as the horizontal distance instead of the hypotenuse, you would have been off a bit and calculated it at around 19.66%. I can't wait for someone in my geometry class to say "yeah, and who else will ever use this besides you?" I'll say "Why Mr. Silver used it in November!"

By the way, that's an impressive hill!