State Highway 105
SH 105; mainline in red, business route in blue
Route information
Maintained by TxDOT
Length	150.4 mi[1] (242.0 km)
Existed	1925–present
Major junctions
West end	Bus. US 290 at Brenham
Major intersections	SH 6 in Navasota SH 249 near Navasota I-45 in Conroe Future I-69 / US 59 in Cleveland
East end	US 69 / US 96 / US 287 at Beaumont
Location
Country	United States
State	Texas
Counties	Washington, Brazos, Grimes, Montgomery, San Jacinto, Liberty, Hardin, Jefferson
Highway system
Highways in Texas Interstate US State Toll Loops Spurs FM/RM Park Rec
← SH 104 → SH 106

State Highway 105 (SH 105) is a state highway in the U.S. state of Texas that runs from Brenham to the outskirts of Beaumont. The route was originally proposed in 1925 and took its current routing in 1984.

SH 105 begins as a pair of one-way roads at an intersection with Business U.S. Route 290 in downtown Brenham. It then progresses northeast out of Brenham through mainly farming lands. It passes near Washington-on-the-Brazos, Texas, which is the birthplace of Texas as the location of the signing of the Texas Declaration of Independence. It then crosses the Brazos River before passing through Navasota. The route briefly joins SH 6 before proceeding east again. It passes near Lake Conroe before entering the city of Conroe and an intersection with Interstate 45. The route continues east, passing through the very southern edge of Sam Houston National Forest before reaching Cleveland and an intersection with Future Interstate 69/U.S. Route 59. The route continues east out of Cleveland, briefly coinciding with SH 321, passing through a large section of East Texas Piney Woods, before reaching its eastern terminus at U.S. Routes 69, 96, and 287 on the far northern edge of Beaumont.

The highway was originally proposed on June 8, 1925 from Brenham east through Navasota and Conroe to Cleveland, roughly paralleling a local railroad line.^[2] By 1926, the section from Brenham to Navasota was transferred to SH 90. On April 6, 1932, a proposed extension east to Moss Hill was designated.^[3] On July 12, 1933, a new section of SH 105 was under construction, being built westward from Beaumont to Moss Hill, replacing SH 133.^[4] On March 19, 1935, it was shifted north through Rye.^[5] On July 15, 1935, all of SH 105 east of Cleveland was cancelled.^[6] On February 11, 1937, the section from Moss Hill to Beaumont was restored (but not Cleveland to Rye, so a gap was created).^[7] On February 25, 1937, SH 105 Loop was designated through Conroe.^[8] On June 21, 1938, the Cleveland-Neville's Ferry Road from Cleveland to Rye had its routing approved, and construction started on it.^[9] On March 18, 1947, SH 105 was routed on the Cleveland-Neville's Ferry Road, closing the gap.^[10] Construction was sporadic, with the section between Conroe and Beaumont not completed until the 1960s. On March 26, 1962, the section of SH 105 from Moss Hill and on a line equidistant between Batson and Saratoga to FM 770 was cancelled, creating a gap. On February 28, 1973, the section of SH 90 from Navasota to Brenham was transferred back to SH 105 and the section of SH 105 from SH 6 west to Loop 508 (now Business SH 6) was transferred to Spur 515. The current route was set on December 21, 1984 with the highway replacing FM 162 and shortening the route from Cleveland to Beaumont. The old route became part of FM 787. One portion of FM 162 was originally designated as FM 1935. On August 25, 2005, a new routing around Cleveland was approved for construction, while the section through Cleveland was designated as a business route of 105: 105-T. Construction has been completed.

SH 105 has one business route.

Business State Highway 105-T is a Business Loop that runs on the former routing of SH 105 through Cleveland in southeast Texas. The road was designated in 2005, in preparation of the bypass routing of the main highway south of Cleveland.^[11]

County	Location	mi[12]	km	Destinations	Notes
Washington	Brenham	0.0	0.0	Bus. US 290 (Market Street / East Main Street)
		0.8	1.3	FM 577 (Blue Bell Road) to US 290 / SH 36
	​	2.7	4.3	FM 50 north – Independence, Brenham Airport
	​	8.2	13.2	FM 2193 east
	​	9.2	14.8	FM 390 west
	​	13.8	22.2	FM 912 east – Washington on the Brazos State Park
	​	18.3	29.5	FM 1155 south – Washington, Washington on the Brazos State Park
Brazos	​	20.6	33.2	FM 159 north – Millican
Grimes	Navasota	24.0	38.6	FM 379 south / Fifth Street / truck route – Wallace Pack Unit
		24.5	39.4	Bus. SH 6 (La Salle Street) – College Station, Hempstead
		25.6	41.2	SH 6 north / SH 90 north – Anderson, Waco, College Station	Interchange
		27.1	43.6	SH 6 south / Spur 515 west (truck route) – Houston, Navasota	Interchange
	​			FM 362 south – Camp Allen, Whitehall
	​			SH 249 south (Aggie Expressway) – Magnolia, Tomball, Houston	Interchange; eastbound exit and westbound entrance
	​			FM 1748 south to SH 249 south	Provides westbound access to SH 249 southbound via FM 1748 south and CR 306 east
	​			FM 2445 north
	​			Spur 234 south – Stoneham
	Plantersville			FM 1774 – Anderson, Magnolia, Fanthrop Inn State Park
Montgomery	Dobbin			FM 1486 – Dacus, Magnolia
	Montgomery			FM 149 (The Montgomery Trace) – Richards, Tomball
				FM 2854 east / Lone Star Parkway
	Conroe			FM 3083 south (Carter Moore Drive) to I-45
				Loop 336 – Cleveland
				I-45 – Huntsville, Houston	I-45 exit 87A
				SH 75 (North Frazier Street)
				FM 1314 south – Porter
				FM 3083 – Grangerland
				Loop 336 to I-45 north – Navasota
	Cut and Shoot			FM 1485 south – New Caney
				FM 1484 west – Groceville
Liberty	​			Bus. SH 105 east – Cleveland	at-grade intersection; west end of freeway
	​			Future I-69 / US 59 – Houston, Lufkin	I-69/US 59 exit 171; interchange; U.S. 59 is the future Interstate 69
	​			FM 1010 – Cleveland, Plum Grove	interchange
	Cleveland			Bus. SH 105 west / SH 321 north – Cleveland, Conroe	at-grade intersection; east end of freeway; west end of SH 321 overlap
	​			SH 321 south – Dayton	East end of SH 321 overlap
	​			FM 2518 to FM 787 – Romayor, Tarkington
	Moss Hill			SH 146 – Rye, Hardin
Hardin	Batson			FM 770 south – Hull	West end of FM 770 overlap
	​			FM 770 north – Saratoga	East end of FM 770 overlap
	Sour Lake			SH 326 – Kountze, Nome
Jefferson	Beaumont			FM 364 (Major Drive) to US 90
				US 69 / US 96 / US 287 – Lumberton, Port Arthur	Interchange
				Concord Road	Continuation beyond U.S. Routes 69, 96, and 287
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access