begins at Marfa in
Presidio County, passes through
Jeff Davis County, and terminates at Pecos in
Reeves County.
Presidio County begins at an
intersection of San Antonio Street and Highland Avenue. In
Marfa, San Antonio Street is . enters the intersection from the south along S. Highland Avenue, then turns east along E. San Antonio Street becoming
concurrent with . proceeds north along Highland Avenue. After two blocks, intersects the beginning of
Farm to Market Road 1112 ( which proceeds eastward along E. Oak Street which runs parallel to the
Union Pacific Railroad. proceeds north an additional two blocks, then turns east along E. Lincoln Street directly in front of the Presidio County Courthouse. One block later, the route turns north and leaves Marfa along N. Dean Street. North of town, the route passes
Marfa Municipal Airport. continues toward Fort Davis as a two-lane roadway with a speed limit. The route follows mostly straight stretches with no sharp turns or steep grades through open ranch land.
Jeff Davis County Soon after entering
Jeff Davis County, continues through a gentle pass across the Puertacitas Mountains. The route then passes along mostly straight stretches through ranch land. Approximately south of
Fort Davis, the route intersects the western terminus of . At this point, joins the
Davis Mountains Scenic Loop. The road then enters Fort Davis where the route is called State Street. intersects approaching from the east via Musquiz Drive just south of the Jeff Davis County Courthouse. At this junction, joins the
Texas Historical Commission's Texas Mountain Trail. runs concurrently down State Street through town and past
Fort Davis National Historic Site for a distance of . The route intersects
Lt. Flipper Drive, the entrance to the historic site. Across from the historic site, the route intersects Blackfoot Drive, known locally as Old Balmorhea Road which is the route's former unpaved roadway before the establishment of the state highway system. Just beyond the historic site, the route intersects Canyon Drive. At this point, , Davis Mountains Scenic Loop, and the Texas Mountain Trail leave the route and continue west along Canyon Dr. toward
Davis Mountains State Park,
McDonald Observatory, and
Kent. Blackfoot Drive merges back with the route as leaves town continuing northward through
Limpia Canyon in the
Davis Mountains with a maximum speed limit of . In Limpia Canyon, the road has many curves, some with recommended speeds as low as as indicated by warning signs. There are also several picnic tables in the canyon followed by one large picnic area just before reaching
Wild Rose Pass. About past this pass, the speed limit increases to . The route remains a two-lane road, but from this point onward there are places where passing lanes occur. Continuing northward, the route intersects the eastern terminus of approaching from Buffalo Trails Boy Scout Ranch. then continues through ranch land and leaves the Davis Mountains before leaving the county.
Reeves County The route continues northward and intersects at
Toyahvale. is the former roadway of before it was replaced by
Interstate 10 (I-10). turns east onto the former roadway and reaches
Texas Park Road 30 into
Balmorhea State Park at Toyahvale. Continuing into
Balmorhea, the route passes fields of alfalfa watered from irrigation ditches including one running parallel with the highway. In Balmorhea, this irrigation channel becomes the centerpiece of a city park along one side of here known as Main Street. The route intersects
Business Interstate 10-F at North Fort Worth Street. I-10 Bus. Loop F going northward becomes to
Toyah after crossing I-10. Eastward, I-10 Bus. Loop F overlays the route of . After Balmorhea, the route has a speed limit of and passes just north of the foothills of the Davis Mountains and through the small community of
Brogado before reaching I-10. At I-10 Exit 209, I-10 Bus. Loop F ends, and merges with the Interstate for slightly more than with a speed limit of . leaves I-10 at Exit 212 and heads northward with a speed limit of toward
Saragosa. At Saragosa, the route intersects which merges with and the speed limit lowers to . In the center of Saragosa, turns westward at West Main Street and loops back to end at the north service road of I-10 and without crossing or intersecting the main Interstate roadway. Beyond Saragosa, the route begins to parallel the route of the
Pecos Valley Southern Railway which will follow the rest of the way into Pecos. The speed limit gradually increases to before intersecting . The speed limit then increases to as the route passes through cotton fields with occasional oil wells. The route then intersects before passing through the small community of
Verhalen. The route then intersects and later . The route passes alongside the community of
Lindsay as it approaches the outskirts of Pecos. The route then passes
Pecos Municipal Airport. The speed limit gradually lowers to and then widens to four lanes before reaching
I-20. In Pecos, the route intersects I-20 at Exit 39 then continues north as South Bickley Avenue. The route then intersects at Stafford Boulevard. Then, further north, terminates at West 3rd Street where it intersects
Business Interstate 20-B. ==History==