 US 67-A, Spur 203, and Spur 310.FM 170 begins at Candelaria at the termination of the Chispa Road, a rugged, unpaved county road in Presidio and Jeff Davis counties that connects to US 90 by way of FM 2017 between Van Horn and Valentine.Although the two-lane road follows along the Rio Grande between Candelaria and Presidio, the river is largely obscured from the road by farm land.