This is a new machine-made singletrack, that largely runs on the side of mtn's. Can be done either as out/back, with folks usually starting at the bottom next to the South Platte River. OR this track shows a shuttle ride starting at the top. VERY smooth track, almost no rocks. Goes down generally, but the start is a steep uphill on Hummingbird trail, to get to the North Fork trail. You can also start a bit farther down on Hwy 97, at the campground. I think you will miss much of the steep climb up Hummingbird. If you start at the north lot, take the north section of Hummingbird to get to the North Fork trail.
The track is really smooth and "green", but the climbs rate it as intermediate. Nice downhills, since they aren't so steep that you are riding your brakes all the way.