State Road 512 (NM 512) is a state highway in Rio Arriba County, New Mexico, United States, that connects U.S. Route 64 / U.S. Route 84 (US 64 / US 84) in Brazos with the end of state maintenance near Corkins Lodge.
NM 512 begins at T intersection with US 64 / US 84 on the northmost edge of the census-designated place (CDP) of Brazos. (Eastbound US 64 / US 84 heads south toward Tierra Amarilla, Tres Piedras, Española, Taos, and Santa Fe. Westbound US 64 / US 84 heads north toward Chama.) From its western terminus, NM 512 proceeds southeast as a two-lane asphult paved road (briefly along the northeastern edge of Brazos) and quickly leaves the CDP.
About southeast of its western terminus NM 512 reaches its junction with the north end of County Route 331 (CR 331) at a T intersection. (CR 331 heads southerly for just over to end at the north end of New Mexico State Road 573 on the northernmost edge of Ensenda.) From its junction with CR 331, NM heads east (north of, but roughly paralleling, the Rio Brazos) for nearly until it reaches its eastern terminus at the Corkins Lodge resort.