Drumlanrig trail map (sorry about the quality):
Blue Trails, 9km. Marked with a
6 on the trail signs.
I think they're mostly fire roads and I'm really only including them for completeness.
Red Trails, 20km. Marked with a
7 on the trail signs.
The meat of the ride. Plenty rooty and technical, right from the start. High spirits and old tyres are going to cause quite a few spills if it's wet. NOTE: The dotted line bail out at Kiln Knowe near the start for those who bite off more than they can chew.
Black Trails, 8km. Marked with a
8 on the trail signs.
From the recce, one suggestion would be to do the red route until Carse Wood, then finish on the black, since it avoids ending the ride by cycling back up the castle drive.
Then lunch.
Then back out again, this time adding in the black section at the start for those that fancy it.