to the county line. Jeff Davis County SH 118 passes through Jeff Davis County for . As the road enters the county, the road intersects Ranch to Market Road 1837 to the Girl Scouts of the USA's Camp Mitre Peak, then SH 118 enters Musquiz Canyon where the road again becomes winding with occasional steep grades and sharp curves. There is another collection of roadside picnic tables near the ruins of the Musquiz pioneer homestead on the highway's right of way within the canyon. After this, the road emerges from the canyon near the Chihuahuan Desert Research Institute and passes along a plateau toward Fort Davis. The road enters Fort Davis as Musquiz Drive and intersects State Highway 17 at South State Street. SH 118 then follows SH 17 through town along State St. passing by the entrance to Fort Davis National Historic Site at Lt. Flipper Drive. The road then passes along the eastern park boundary until SH 118 separates from SH 17 on the north edge of town. SH 118 then follows Canyon Drive out of town along the north boundary of the national historic site into Limpia Canyon. The road then enters Davis Mountains State Park where it intersects State Park Road 3. The road then proceeds toward Mount Locke and McDonald Observatory with many roadside picnic tables between Fort Davis and the observatory. The route toward the observatory has numerous steep grades and tight curves. At Mt. Locke, SH 118 intersects State Highway Spur 78 which proceeds the rest of the way toward McDonald Observatory. Beyond the observatory at Eppenauer Ranch, the road becomes much more rugged with narrower lanes and only grass shoulders. The road continues through steep grades and curves requiring slow speeds through the forested higher elevations of the Davis Mountains. Along this stretch to the intersection at SH 166, the roadway is often not fenced and cattle guards cross the road. Loose livestock pose a hazard to motorist in this portion of the road. In this section of the road is the Lawrence E. Woods Park in Madera Canyon, a roadside drive with five picnic tables amidst a grove of Ponderosa Pines that is also the trail head of a Davis Mountains Preserve hiking trail. After the intersection with SH 166 toward Valentine, SH 118 alternates between straight and mountainous stretches for the remainder of the distance in the county. Culberson County