Route 66 in New Mexico was marked over portions of two auto trails — the National Old Trails Road from Arizona via Albuquerque and Santa Fe to just shy of Las Vegas, and one of the main routes of the Ozark Trails network from that point into Texas. The state had taken over maintenance of these roads under several numbers: NM 6 from Arizona to Los Lunas, part of NM 1 through Albuquerque and Santa Fe to near Las Vegas, NM 56 to Santa Rosa, the short NM 104 to Cuervo, and part of NM 3 to Texas. While NM 56 and NM 104 were completely absorbed by US 66, NM 6 was reassigned to a route splitting from US 66 (old NM 6) at Laguna and heading straight east through Albuquerque, Moriarty, and Palma to US 66 at Santa Rosa. Except between Albuquerque and Moriarty, where it formed part of US 470, this was an unimproved road.