The Circle Trail begins off of Section Point near the Blackhawk Pass Section of the CT. The first section involves difficult route finding and the GPS track is approximate. After the first section, the trail becomes well-defined and is a blast of a descent on some of the skinniest singletrack in Colorado.
Follow Silver Creek Road
out to finish with a beer and some food in Rico. This can be ridden as an epic loop out of Rico via Scotch Creek -> Blackhawk Pass -> Circle -> Silver Creek.