Texas State Highway 166

State Highway 166
Route information
Maintained by TxDOT
Length:	43.089 mi[1] (69.345 km)
Existed:	1927[2] – present
Tourist routes:	Davis Mountains State Park Highway[3]
Restrictions:	10' maximum width between SH 118 and FM 505[4]
Major junctions
West end:	SH 118
	RM 505
East end:	SH 17
Location
Counties:	Jeff Davis
Highway system
Highways in Texas Interstate US State Toll Loops Spurs Park Rec FM ← RM 165 Loop 166 →

SH 166 near Sawtooth Mountain in western Jeff Davis County

State Highway 166 or SH 166 runs for 43.0 miles (69.2 km) from SH 118 near Nunn Hill in northern Jeff Davis County, Texas passing around a major portion of the Davis Mountains before ending at SH 17 about two miles south of Fort Davis. The highway is maintained by the Texas Department of Transportation (TxDOT).

The scenic highway was originally a longer loop around the mountain range and was envisioned in 1927 as a "state park highway" until an actual state park could be established in the area. SH 166 facilitated construction of Davis Mountains State Park and the University of Texas at Austin's McDonald Observatory during the 1930s.

SH 166 is located entirely within Jeff Davis County and forms part of the route linking Fort Davis, the county seat, to Valentine, the county's only incorporated town. The highway link to Valentine is the only highway intersection between the termini of SH 166, and the rural route does not pass through any cities or towns.

History

In 1923, the Texas Legislature directed the State Parks Board, a predecessor agency to today's Texas Parks and Wildlife Department, to consider the Davis Mountains as the location of a new major destination park. After the parks board was initially unable to acquire appropriations or land donations for a park, the Legislature in 1927 instructed the Texas Highway Department, a TxDOT predecessor, to build the Davis Mountains State Park Highway on donated right of way. In 1933, the effects of the Great Depression finally encouraged local landowners to donate land for the proposed park to stimulate the local economy.^[5] By this time, the road had been built from Fort Davis as far as the Fowlkes Ranch^[6] enabling construction of nearby McDonald Observatory and Davis Mountains State Park.^[5]

By 1939, the route had been extended to make a complete loop around the highest portion of the Davis Mountains ending at its point of origin in Fort Davis.^[1] The highway at that time shared the route of SH 17 through Fort Davis^[7] and SH 118 was extended over the northern portion of the highway to Kent.^[8] In 1941, the route designation between Fort Davis and Nunn Hill was canceled with that stretch retaining its designation as SH 118.^[1]

Route description

The road is within Jeff Davis County, and its entire length is part of the Davis Mountains Scenic Loop along with portions of SH 17 and SH 118.^[5] The route begins at SH 118 near Nunn Hill approximately 19 miles northeast of Fort Davis. Nearly the entire length of the road is through ranch land. The route travels southeast 20.1 miles (32.3 km) through winding, mountainous canyons until intersecting Ranch to Market Road 505 to U.S. Route 90 and Valentine.^[9] During this portion of its route, the road has narrow lanes and grassy shoulders.

At RM 505, the highway becomes part of the primary route between Valentine and Fort Davis, the only two towns in the county. Past this junction, the route turns eastward, and the roadway improves with paved shoulders and wider lanes for the remaining 22.9 miles (36.9 km) until its terminus at SH 17 about 2 miles (3 km) south of Fort Davis.^[9]

There are no towns along the route. The road's right-of-way is not fenced through many pastures, and loose livestock on the roadway present a hazard to motorists. Much of the route offers views of Baldy Peak atop Mount Livermore, the highest summit in the Davis Mountains.^[10]

Major intersections

The entire route is in Jeff Davis County.

Location	mi[9]	km	Destinations	Notes
	0.0	0.0	SH 118 – Kent, Fort Davis	Western terminus
	9.7	15.6	Sawtooth Mountain picnic table
	20.1	32.3	RM 505 – Valentine
	33.8	54.4	Point of Rocks roadside park
	42.9	69.0	SH 17 – Fort Davis, Marfa	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

• U.S. Roads portal
• Texas portal

References

1. Transportation Planning and Programming Division. "State Highway No. 166". Highway Designation Files. Texas Department of Transportation. Retrieved 2009-12-21.
2. Gammel, Hans Peter Mareus Neilsen, ed. (1927). "Chapter 37: Davis Mountains State Park Highway". General and Special Laws of the State of Texas Passed by the Fortieth Legislature at the First Called Session. The Laws of Texas [Volume 25]. Austin, Texas: Gammel's Book Store. pp. 110–111. Retrieved August 16, 2013.
3. "Davis Mountains State Park Highway" (PDF). Texas Department of Transportation. February 2, 2010. Retrieved August 19, 2013.
4. "El Paso District Permit Restrictions". Texas Department of Motor Vehicles. April 6, 2011. Retrieved August 19, 2013.
5. "TPWD Park: Davis Mountains State Park". The Look of Nature: Designing Texas State Parks During the Great Depression. Texas Parks and Wildlife Department. Retrieved 2009-12-21. External link in |work= (help)
6. Official Map of the Highway System of Texas (Map) (June 15, 1933 ed.). Texas State Highway Department. § M6-7. Retrieved 2009-12-21.
7. Transportation Planning and Programming Division. "State Highway No. 17". Highway Designation Files. Texas Department of Transportation. Retrieved 2009-12-21.
8. Transportation Planning and Programming Division. "State Highway No. 118". Highway Designation Files. Texas Department of Transportation. Retrieved 2009-12-21.
9. Google (2013-10-19). "Overview of SH 166" (Map). Google Maps. Google. Retrieved 2013-10-19.
10. "Texas' Natural Environment". Texas Almanac 2008-2009. Texas State Historical Association. Retrieved 2009-12-21.

External links

Route map: Bing / Google

Geographic data related to Texas State Highway 166 at OpenStreetMap