Exit 523 (US 87 - Fredericksburg/San Angelo) and go south
on US 87 towards Comfort. Turn left at the first blinking
light onto FM 473. Go 4.7 miles. FM 473 goes to the right
but you continue straight ahead (road will narrow) on Old
#9 Hwy. Go 2.9 miles, crossing Block Creek (one-lane bridge)
to our Green Pipe & Rock entrance on the right.