FM 102 begins at a three-way traffic signal on SH 60 and Future Business Interstate 69/Business U.S. Route 59 in Wharton.

FM 102, which is also called Ogden Street, heads west-northwest for 1.4 miles (2.3 km) before coming to the Future I-69/US 59 overpass.

After continuing west-northwest, a distance of 3.5 miles (5.6 km), the highway reaches the intersection with FM 640 near the former community of Sorrelle.

An additional 1.1 miles (1.8 km) brings the traveler to Glen Flora and its junction with FM 960.

The highway turns left (northwest) onto Main Street and shares its right-of-way with US 90 Alt.

When US 90 forks to the left, FM 102 goes straight on Main Street into downtown Eagle Lake.

Within a few blocks, FM 102 leaves Eagle Lake behind as it heads northwest alongside the railroad tracks.

Traffic can access I-10 east and west by using entrance ramps from the frontage road.

On March 28, 1952, FM 102 was extended about 14 miles (22.5 km) northwest from Eagle Lake to US 90 east of Columbus.