Ya, I'd like to learn a little more about this area as well. I rode some of Highline from the Fish Hatchery East, just out and back. I REALLY liked what I was seeing, true narrow single track through the pines. Unfortunately the buddy I was with was not in the condition to really explore a lot of it. But it's a beautiful area and checks the adventure box! Seems a bit disjointed for a longer ride or loop.