State Road 573 (NM 573) is a state highway in Rio Arriba County, New Mexico, United States, that connects New Mexico State Road 162 (NM 162) in Tierra Amarilla with County Route 331 (CR 331) and County Road 327 (CR 327) in Ensenada.
NM 573 begins at a T intersection in the northern part of the census-designated place (CDP) of Tierra Amarilla. (NM 162, which forms an eastern loop off of U.S. Route 84 [US 84], heads north toward U.S. Route 64 (US 64) / US 84 and south toward 64 and then US 84.) From its southern terminus NM 573 proceeds northeasterly at a two-lane asphalt paved road to quickly leave Tierra Amarilla.
NM 573 continues its north-northeasterly heading for about to enter the CDP of Ensenada. Just under farther north NM 573 reaches its northern terminus with CR 331 and CR 327 at a T intersection on the northern edge of Ensenada. (CR 331 heads northerly for just over to end at New Mexico State Road 512. CR 327 heads easterly for less than before ending at a private residence. County Road 339A, which forks off to the west from CR 331 immediately west of NM 573's northern terminus, is the pre-1988 routing of NM 162.)
From the 1950s until 1988 the road that is now NM 573 was originally designated as NM 162. NM 573 was created in 1988 when NM 162's northern terminus was changed to its current location to (end a U.S. Route 64 / U.S. Route 84 in New Mexico) and the previous segment of NM 162 (from Tierra Amarilla to Ensenada) was designated as NM 573 and the segment from Ensenada west to US 64 / US 84 became County Road 339A.