New Mexico State Road 421
NM 421 highlighted in red | ||||
| Route information | ||||
| Maintained by NMDOT | ||||
| Length | 8.101 mi (13.037 km) | |||
| Existed | 1988–present | |||
| Major junctions | ||||
| West end | NM 402 near Sedan | |||
| East end | SH 102 at the Texas state line | |||
| Location | ||||
| Country | United States | |||
| State | New Mexico | |||
| Counties | Union | |||
| Highway system | ||||
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State Road 421 (NM 421) is a 8.101-mile-long (13.037 km) state highway in the U.S. state of New Mexico maintained by the New Mexico Department of Transportation (NMDOT). The road, located in southeastern Union County, begins at NM 402 between Amistad and Clayton and passes eastward through the town of Sedan to the Texas state line where the roadway continues as Texas State Highway 102 (SH 102) to U.S. Route 87 (US 87) near Dalhart, Texas. Before 1988, the road was part of a much longer NM 102.