SH 102 is located in southwestern and south central Dallam County and does not pass through any cities or towns.

The highway has a short concurrency with FM 3110 before terminating at US 87 7.0 miles (11.3 km) northwest of Dalhart.

SH 102 travels in a straight line for almost its entire length encountering only flat High Plains terrain.

[7] On May 4, 1925, SH 102 was also designated over a route from Taylor via Lexington to Caldwell in Williamson, Milam, Lee, and Burleson counties.

[1][14] The current highway was first designated as Farm to Market Road 808 from the eastern terminus at US 87 to a point 13.3 miles (21.4 km) westward on July 20, 1948, along with FM 807 in the same county.