First section is between the parking lot and main (Volksweg) Trail. This is fun to take downhill entering off the trailhead close to the lot. The main trail network weaves in and out of a doubletrack loop. Easy to go down a poorly maintained trail, but the main singletrack trails are pretty-well maintained. I'll try to GPS in the trails in the near future.
From Red Rock dam driving NE, park in first lot on right after dam. Enter off of main paved trailhead on North side of lot. First section is 50 feet from lot on right, main section is at the bottom of the paved trailhead... on the east side of the Volksweg Trail.
http://www.singletracks.com/item.php?c=1&i=6483