Highway 170 on the Texas -Mexican border from Lajitas to Presidio is a road well worth taking. It dips and bends skirting the border and the Rio Grande the whole way. At one point the grade up and down a pass is a 15% incline. Pulling a trailer is a challenge but the scenery was wow and the fort at the Presidio a must see. Then there was a rest area with three covered picnic stations in the form of giant teepees. Well done, West Texas.