TX-166 scenic loop that starts south of Fort Davis is a nice and relaxing ride. There are some curves to make it interesting but TX-166 it is not a difficult ride. The road surface is in good condition most of the way. The scenery is great, lots of mountains that makes one feel very small. TX-166 ends at TX-118 north of Fort Davis and ~15 mi north of the McDonald’s Observatory. TX-118 heading back to Fort Davis has a bumpy road surface with plenty of curves; the bumpiness prevents a fun ride. But, once TX-118 bends around to the observatory the road surface smooths out and the curves and grade become more challenging. It is really a 15-mile fun ride on a sports bike back to Fort Davis from the observatory. We have ridden this 15-mile portion back and about 20 X since we have been staying in Fort Davis because it is so much fun. The detailed description of the route is shown below:
Fort Davis Scenic Loop – TX-166 – 75 mi
South on State St / TX-17/ TX-118 in Fort Davis. Go ~0.1 mi.
Right onto TX-17 S/ State St. Go 2.3 mi.
Right onto TX-166 N. Go 43.0 mi.
Right onto TX-118 S. Go 29.4 mi back to Fort Davis.