For what it's worth, I did that route on Thursday afternoon. Very nice! Not so difficult that it broke my legs, but good enough to get the heart pumping - and some nice views too. Headed back by way of Clear Creek Trail, then Platte River trail - interesting trying to make sense of it all, but made it back to the hotel all in one piece and just in time to see a bunch of protesters. All in all, a good end to an otherwise mundane business trip.