Length: 1.420 mi.

County: Doña Ana

History: Created probably c. 1960 when the first piece of I-25 opened around Las Cruces, along University Avenue on the north side of NMSU. Originally extended south to U.S. 80 at the offramp from I-10. Probably in 1988, extended west to NM-28. In 2003, portion east of Main St. turned back to City of Las Cruces.

Improvements: Two to four lane paved.

Comments: In 1971, there was a U.S. 85 sign posted westbound at the NMSU exit (even though the exit always was marked NM-101). Possibly there was a plan to reroute 85 from I-25 onto this road, then onto Valley Drive. It was never posted any further than this.

Length: 46.318 miles

County: Harding, Union

History: Original route, established in the 1940s, ran from NM-18 (402) to Sedan. This was extended to Texas in the early 1950s, and combined in mid-1950s with part of old NM-57 and old NM-171 (S of Bueyeros). In the 1988 renumbering, it also took over the part of old NM-65 (now NM-420) from the junction of 102 to NM-39. The original segment from NM-402 to Texas was renumbered NM-421.

Improvements: Two-lane paved highway

Comments:

Length: 3.9 miles

County: Catron

History: Only shown on the 1995 and later official NM highway maps. Probably established in or after 1988.

Improvements: Two-lane paved highway

Comments:

Length: 106.897 miles

County: San Miguel, Quay

History: This route was first established in the 1930s to connect NM-65 to NM-129 near Conchas Dam. It was extended to Tucumcari in the 1940s and later overlaid with 65 from their east junction to Las Vegas. In 1988, NM-65 was dropped from the concurrent portion east of Las Vegas.

Improvements: Two-lane, paved

Comments: I'm not sure what the purpose of the overlay with 65 was, since 104 didn't apparently continue independently west of Las Vegas at that time.

Length: 9.1 miles

County: Mora, San Miguel

History: Established in the early 1950s. No changes in this route since then.

Improvements: Two lane, paved

Comments:

Length: 11 mi.

County: Rio Arriba

History: Established early-mid 1930s as one of several routes that connected New Mexico and Colorado northwest of Chama, prior to extension of U.S. 84. This was actually the main route from Chama to Colorado in the early 1930s, and the designation for this route is not evident from this time period. Removed from state system within a few years

Comments:

Length: 0.752 mi.

County: Santa Fe

History: Established 1980s, originally ran to NM-68 along what is now NM-583. That segment renumbered in 1988.

Improvements: Two lane, paved

Comments: Runs along the extension of La Mesilla Road (south of 84-285 it is NM-399) through the hamlet of Sombrillo.

Length: 41.722 mi.

County: Socorro

History: Established on essentially this alignment in the mid-1930s.

Improvements: Mostly a gravel road

Comments:

Length: 23.38 mi.

County: Curry

History: Established early 1950s, extended northward by the mid-50s as far as NM-93, then truncated at NM-19 in the 1980s.

Improvements: 2-lane, paved road

Comments: Runs just west of and parallel to the Texas state line

Length: 7.757 mi.

County: Valencia

History: Appears to have been established around 1980.

Improvements: Two-lane, paved

Comments:

Length: 3.798 mi.

County: Rio Arriba

History: This route, 100 and 111 have a little bit of an intertwined (and unclear) history. In the 1930s, this route may have been assigned to what became NM-100 from Vallecitos to Tres Piedras, and 100 may have extended over what became this route east of Canjilon. In the mid-1930s, 110 extended from Vallecitos to NM-74 (U.S. 285) at Tres Piedras. By the 1940s, it was moved onto the route beginning near Canjilon and terminating at its present location. In the 1980s, the road from west of El Rito to Canjilon was removed from the state highway system and became a NFS road. West of Canjilon, it became NM-115.

Improvements: Existing portion of the state route is paved.

Comments: Its southern terminus, NM-554, was originally part of NM-96

Length: 19.519 mi.

County: Rio Arriba

History: Originally, this number was assigned in the 1930s to the route from Tres Piedras to Arroyo Hondo. It was extended south to Vallecitos and further south along its current alignment to U.S. 285 in the 1940s. In 1974, U.S. 64 replaced the original part of this route between U.S. 285 and NM-3 (522).

Improvements: Existing portion of the state route is paved.

Comments:

Length: 44.755 mi.

County: Rio Arriba

History: Established in the early 1930s, originally beginning at El Vado. Extended south to NM-96 in the mid-1930s.

Improvements: Gravel section south of El Vado Lake, otherwise two-lane paved.

Comments:

Length: 20.647 mi.

County: Hidalgo

History: Established probably in or after 1988.

Improvements: Paved road

Comments:

Length: 3 mi.

County: Socorro

History: Established early 1950s, remained in state highway system until 1970s.

Improvements: Gravel road

Comments: Must've been something at Kelly to warrant a state highway. Maybe a big mine?

Length: 47.054 mi.

County: Roosevelt

History: Renumbered from NM-116 in the 1980s, which had in turn been renumbered from NM-92 in the 1950s. Both renumberings were in response to the corresponding Texas route being renumbered.

Improvements: Two-lane, paved

Comments: NM/TX-114 created a continuous route to Dallas.

Length: 3.457 mi.

County: Rio Arriba

History: Created in the 1980s when part of NM-110 was removed from the state highway system.

Improvements: Paved

Comments:

Length: 47 mi.

County: Roosevelt

History: Redesignated from NM-92 in the mid-1950s when the corresponding Texas route was renumbered TX-116. In the 1980s, it was again renumbered NM-114 when TX-116 was changed to TX-114.

Comments:

Length: 15.792 mi.

County: Socorro, Valencia

History: An old piece of U.S. 85 that was restored to the state system in the 1980s. Not sure if it is part of the 1988 renumbering since U.S. 85 wasn't on this road at that time.

Improvements: Paved two lane

Comments:

Photo taken October 2005 at junction of NM-36

Length: 62.058 miles

County: Cibola

History: Originally established in the 1930s between U.S. 60 at Pie Town and NM-36 at Trechado (became NM-36, currently NM-603). Moved in 1940s to new route from Quemado to Trechado, extended in the early 1950s to U.S. 66 (current I-40) near Grants. Took over former NM-124 running parallel to I-40 west to Grants around 2000. On south, truncated to NM-36 at Trechado in 1988.

Improvements: Paved, two-lane road

Comments: Note that this took over former NM-124 from the I-40 interchange to Grants. Why the route shuffle took place, probably in conjunction with former BL I-40 through Grants being redesignated as NM-122, ins't clear.

Length: 36.852 mi.

County: McKinley

History: Redesignated mid-1980s.

Improvements: Two-lane, paved except divided section through Gallup

Comments: Concurrent with BL I-40 through Gallup.

Length 5.647 mi.

County: Guadalupe

History: Established early 1950s. Unchanged since that time.

Improvements: Two-lane, paved

Comments:

Length 119.031 mi.

County: Harding, Union

History: Renumbered from NM-62 in 1932 when U.S. 62 was extended into the state. Extended northeast and north in the mid-1930s to Grenville. Segment north of U.S. 56 renumbered as NM-434 in 1988.

Improvements: Two-lane, paved except for gravel from Black Lake to Ocate.

Comments: This is the longest continuous state-numbered route. (Previously, it was NM-44 until that became U.S. 550, and before that it was NM-18 until the 1988 renumbering). If NM-9 is extended east of its current terminus, that road will take the honor.

Length 8.581 mi.

County: Mora

History: Established early 1950s.

Improvements: Paved, two lane

Comments:

Length 38.740 mi.

County: McKinley, Cibola

History: Redesignated mid-1980s. Assumed part of the former BL I-40 around 2000 as far east as the east Grants exit.

Improvements: Two-lane, paved except divided section through Gallup

Comments: Note that this took over the former I-40 business route through Grants.

Length: ~30 mi.

County: Mora

History: Established c. 1930. Removed from state system by mid-1930s, then portion of route between Watrous and Fort Union restored as state highway in mid-1950s as NM-477. This segment is now part of NM-161.

Comment: The road between Ft. Union and La Cueva does not even show on maps any more. This designation does not appear to have been reused since the early 1930s.

Length: 25.523 mi.

County: Cibola

History: Redesignated mid-1980s.

Improvements: Paved, two lane

Comments: Part of Route 66. Gave up part of its route to NM-117 around 2000, probably at the time that BL-40 through Grants became NM-122.

Length: 25.412 mi.

County: Lea, Roosevelt

History: Established mid-1950s as NM-294, renumbered in late 1950s as NM-125 presumably to match the renumbered adjoining Texas route.

Improvements: Two-lane, paved.

Comments: