Crestline starts with a steep, loose climb that will test your traction control. That section eventually mellows out into some fun, swoopy XC riding. The trail crosses roads often and is easily picked up on the other side of the road until you arrive at a 4 way intersection around mile 8.0. In front of you'll be 3 roads. Choose the center road, follow it for no further than a football field and look to your left.
From here, Crestline heads up and into the woods again. There are two short, very steep, heart popper hills (see if you can make it to the top of the 2nd one and get over the root without dabbing!) followed by some extra fun, flowy downhill that will lead you into a short technical section (those of you riding short travel be cautious your first time down) and back onto the road at the top of Greenline #6