Texas State Highway Spur 581
Spur 581 is a state highway spur located in Frio County.Spur 581 begins at I-35/FM 1583 in Derby. The highway runs to the north, paralleling both I-35 and a line of the Missouri Pacific Railroad, crossing the rail line north of Derby near County Road 3410. South of County Road 3201, Spur 581 passes by McKinley Field before entering Pearsall. Just north of the Pearsall city limits, the highway has an intersection with FM 1582. Spur 581 runs north through town on Oak Street before ending at an intersection with BL I-35/FM 140 near the town square.History
Spur 581 was designated on March 26, 1991, with the mileage being transferred from US 81 when that highway was decommissioned south of Fort Worth.Junction list
