From Amarillo, drive east on I-40 about 40 miles to the town of Groom. Watch for a dirt road coming in from the right, between two grain elevators, about midway through town. Turn right, set odometer.
Road dips down, then back up a rise.
First hp area is along road at mile 4.3, which is 1.4 miles east of Road 30. The topo shows another area about half a mile northeast, but I believe this to be a mistake. There was clearly no area east of the county line that was as high as the road. I leveled it to be sure. About 100 feet tall or more, this cross was built along the interstate and is visible for miles in any direction, including from the Donley hp.