From the Dredge Trailhead along Tiger Road, cross the road and climb gravel Summit Gulch Road
(GH 74) passing Galena Gulch Road on the right at 1/3 mile, several homes on the right at 1/2 mile, and Galena Ditch Trail
at 1 mile. A steep 1/3 mile above the end of Galena Ditch Trail
, ZL begins at a trail marker and timber fence on the left of the road.
ZL climbs through a switchback, crosses Summit Gulch Road
at a pair of timber barriers and a bridged creek then traverses an old flume bench for 1/4 mile before climbing through a series of switchbacks above a house: the trail high point.
Descend south back to the old flume and pedal to Galena Gulch Road, passing a new moto singletrack switchback (currently under construction). There is a pair of timber barriers at Galena Gulch Road. Cross the road, another bridged creek, and ascend the final, short climb.
Top out and descend across gravel Rac Jac Way (note: no timber barriers at this road crossing), through a meadow and contour below power lines in a clear-cut to a 3/4 mile descent passing through a number of features: berms, gaps, etc.
Descend to a large flume ditch (this is actually the extreme western end of Galena Ditch aka "The Big Ditch"). Turn left on the ditch contouring to and across paved Discovery Hill Drive to a final singletrack descent to the Discovery Ridge
From here go right to return to the Dredge Parking Lot, or turn left to and descend to The Ledge
, Gold Run Road
, Tom's Baby