I did this ride last Fall and this Spring, but this year my wife joined me with some trepidation. She, however, did great. We had to buy a three day camping pass in order to drive back to Teklanika campground in Denali Park but we weren't there for camping. We came around the corner at the top of Sable Pass and almost ran into a grizzly sow and her year old cub. They were about 30 feet from us. A bus came in about two minutes and scared them off. We watched them both go for a swim in a nearby lake a few minutes later. It's not a long ride, out and back, but the hills were a definite workout with extended 7-8% grades and quite a few pieces at 11 to 16%... the colors were incredible this time of year. Roughly 35 miles.