I’ve been up and over Doi Suthep several times in the past few weeks and noticed some changes. They have paved 3.3 km of trail from the checkpoint, past the campground, and towards Chang Khian village – the pavement almost reaches the little coffee shop up there. Of course, the little road is only 1.5 lanes wide, just like the road leading up to the checkpoint. Nice little concrete drainage ditches and even some shiny new guardrail. I also found this map. http://www.mountainbikingchiangmai.com/downhill.html I’ve ridden A, B and C on my DRZ as well as downhill on my mountain bike but I’ve yet to find trail D. Does anyone have a track or waypoints?