Take Big Elk Trail at Hwy 64 (turning Left or west when heading north). Cross the Grand Canyon Railroad tracks and turn right. Follow the road around a few turns until the entrance of Four Hills Ranch. Turn right and drive a few miles (passing the old ranch headquarters and then across the canyon). W.Blanco - QuarterHorse should be the first Left after coming out of the canyon area (just passed Fire Sky Trail) - the roads may not be marked. After turning on W.Blanco/QuarterHorse make another left after about a 100 yards or so. Tract 850 will start about 500 feet to your Right Side. You can drive along most of the parcel until the end of the road. The southern boundary can be accessed off QuarterHorse. Cindered roads are maintained by the POA.