Farm to Market Road 3338 is a 7.831 miles (12.6 km) Farm to Market Road that connects the Laredo, Texas Industrial Area with rural Webb County. Its intersects State Highway 255 then turns into a gravel road.
FM 3338 begins at an intersection with FM 1472 on the edge of Laredo in Webb County, heading northwest into unincorporated areas as two-lane undivided Las Tiendas Road. The road heads through rural areas of ranches for several miles. FM 3338 reaches its northern terminus at an intersection with SH 255 (Camino Colombia Toll Road). North of here, Las Tiendas Road continues as an unnumbered gravel road.