[2] Just after entering Doña Ana, NM 320 connects with the north end of Dusty Lane and then crosses Abeyta Street as the highway turns to head east.

Directly thereafter, NM 320 turns to head northeast again as it connects with the north end of El Camino Real Road and passes between two gas stations (the southern of which also serves as the local stop for Greyhound Lines intercity bus service.

)[4] Immediately thereafter, NM 320 reaches a diamond interchange with I-25/US 85 (Exit 9) on the southeastern corner of the limits of Doña Ana.

Just over 200 feet (61 m) northeast of the northbound ramps, NM 320 reaches the "end of state maintenance" and its eastern terminus.

Interestingly, the section the west end (between the western terminus and Dona Ana Road had a somewhat higher AADT of 5,575.