Tenmile Peak to Peak 5 - Class 4
I have done this route twice in the past couple of years. The first time was in August of 2013 was with Kristi Floyd Henes and Kim Raupp. The second was in July of 2015 with Jim Griffiths... his first class 3/4 route. If you drive Miner's Creek Road to the Colorado Trail... the route is about 7 miles and 3200 vertical. It took us about 6 hours. The traverse has a lot of great route finding and exposed scambling. The route is also easy to access and has amazing views that tie Summit County together. I can't imaging not doing this again.
Here is a link for the GPX file from our trip.