Western Zippety is a fantastic narrow trail that hardly gets used. It is mainly used to get to the Frontside trail or back to the main TH parking area. It is a fun, rolling, non tech singletrack on the perimeter of the trail system. I prefer to ride this trail back to TH from Frontside. Take the singletrack from the SW end of TH parking lot to the jct. with Zippety Do Da and then go left. This will run into a doubletrack(1.3 mi), go right. After another 1.6 miles take a right onto marked singletrack Western Zip. This will intersect Frontside at the base of the Book Cliffs. You can return the same or connect to Joe's or Zippety or Kessel Run. Have fun.