I went up that in September, not aware of the degree. Part of the problem is that there is a traffic light at the bottom that can prevent any "run" at the beginning of the hill; you might start from a dead stop. It seemed to go on and on...... and at 330HP towing a toad, well, let's just say there was plenty of time to enjoy the scenery.
2002 40' Holiday Rambler Endeavor
2008 Ford Edge TOAD