FM 148 begins at an intersection with State Highway 274 near Kemp just west of Cedar Creek Reservoir.

The highway runs in a west–east direction from SH 274 to FM 3094, making a 90-degree angle to the north towards Grays Prairie.

FM 148 enters the town of Scurry, sharing a short overlap with State Highway 34.

FM 148 meets Interstate 20 and Spur 557 in a fast growing area of the town's southwest side, before seeing less development.

FM 148 was extended again on November 1, 1961 to SH 274, absorbing Farm to Market Road 988.