State Highway 21 | ||||
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Route information | ||||
Maintained by TxDOT | ||||
Length: | 272.7 mi (438.9 km) | |||
Existed: | April 4, 1917 – present | |||
Major junctions | ||||
West end: | I-35 at San Marcos | |||
SH 130 Toll / US 183 in Mustang Ridge |
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East end: | LA 6 near Milam | |||
Location | ||||
Counties: | Hays, Caldwell, Bastrop, Lee, Burleson, Brazos, Madison, Houston, Cherokee, Nacogdoches, San Augustine, Sabine | |||
Highway system | ||||
|
SH 130 Toll / US 183 in Mustang Ridge
US 290 near Paige
US 77 near Lincoln
SH 6 / US 190 in Bryan
I-45 / US 190 in Madisonville
US 287 in Crockett
US 69 in Alto
I-69 / US 59 in Nacogdoches