It runs from SH 67 northeast of Breckenridge westward to the Texas Department of Criminal Justice's Walker Sayle Unit.

A previous route numbered FM 1808 was designated on November 20, 1951, from US 80 (now I-20 Business) at Westbrook to a point 5.8 miles (9.3 km) south.

[14] A previous route numbered FM 1810 was designated on November 20, 1951, from US 287, 3.5 miles (5.6 km) east of Vernon, northeast to Kingola.

[30] The first route numbered FM 1820 was designated in Shelby County on November 20, 1951, running from SH 87 at Shelbyville northeastward to Carroll Church at a distance of 6.4 miles (10.3 km).

[31] The second route numbered FM 1820 was designated in Wise County on April 25, 1978, running near the Lake Bridgeport Dam southeastward to US 380 at a distance of 1.1 miles (1.8 km).

The highway starts out running in a west direction along MH 379, then turns north onto Garrett Morris Parkway.

The highway leaves the Mineral Wells city limits just north of an intersection with FM 3027 and passes near a subdivision before the route becomes more rural.

FM 1821 turns west at Hayes Road and continues to travel in a westward direction, ending at an intersection with US 281.

A previous route numbered FM 1821 was designated on November 20, 1951, running from SH 7 near Center southward to Jericho at a distance of 3.7 miles (6.0 km).

[36] A previous route numbered FM 1824 was designated on November 20, 1951, running from US 281 near Johnson City northwest 4.5 miles (7.2 km) toward Sandy.

FM 1825 also includes a short 0.8-mile (1.3 km) unsigned spur along Vision Drive that acts as a bypass for the north–south section running parallel to I-35.

[45] The route proceeds northeast 8.4 miles (13.5 km), entering Travis County to intersect the stub end of the southern segment of SH 45.

[44][46] RM 1826 was designated on November 20, 1951, as Farm to Market Road 1826 (FM 1826), from US 290 southwestward to the Hays County line.

[44] The first use of the FM 1828 designation was on November 20, 1951, in Collin County, from SH 24 west of McKinney north 3.0 miles (4.8 km) to a road intersection.

A previous route numbered FM 1829 was designated on November 20, 1951, from SH 10 in Pilot Point west 5.8 miles (9.3 km) to a road intersection.

The highway travels in a northern direction along the eastern edge of the town, leaving the city limits at an intersection with Hickory Hill Road.

FM 1830 travels through areas that feature a mix between subdivisions and farm land, entering Denton near Ryan Road.

It connects the Girl Scouts of the USA's Camp Mitre Peak to SH 118 14.2 miles (22.9 km) south of Fort Davis.

FM 1847 was originally designated on November 20, 1951, from a road intersection southward 4.1 miles (6.6 km) to SH 100 in Los Fresnos, Texas.

[94][96] The current designation for FM 1863 was introduced on December 17, 1952 (numbered January 23, 1953 or later); at that time, the route's western terminus was listed as a "road intersection" 5 miles (8.0 km) west of SH 46.

[94] A previous route numbered FM 1863 was designated on November 20, 1951, from SH 21 near Chireno north 6.3 miles (10.1 km) via Attoyac to a road intersection.

[99] The route enters Val Verde County and travels to the northeast before ending at the Union Pacific Railroad line in Pumpville.

[104] It begins in Burnet County at an intersection with RM 1174 south of Bertram, within the Balcones Canyonlands National Wildlife Refuge.

The route travels east into Williamson County, crossing SH 29 in Liberty Hill, before turning to the northeast and ending at a junction with US 183.

The highway immediately crosses the Union Pacific Railroad tracks and heads straight to the northwest for about 2.75 miles (4.43 km).

Farm to Market Road 1883 (FM 1883) is located in south central Clay County, with a spur connection to the unincorporated community of Deer Creek.

[141] A previous route numbered FM 1895 was designated on November 20, 1951, from US 81 at Millet southeast 9.0 miles (14.5 km) towards Los Angeles.

A previous route numbered FM 1898 was designated on December 18, 1951, from SH 10 (now US 377) at Collinsville east and south 5.9 miles (9.5 km) to Ethel.

[148] Its western terminus is at I-20 exit 220, approximately 2 miles (3.2 km) east of Colorado City; the unimproved roadway that runs south from this interchange is CR 135.

[149] It runs northward and then eastward for 8.7 miles (14.0 km) before ending at FM 644, from where the unimproved roadway continues as CR 464.