New Mexico is listed with 487 miles in the U.S. Route 66 mileage breakdown.
Route 66 crossed New Mexico from the Arizona state line near Lupton to the Texas state line near Glenrio. Its alignment changed substantially over time. Before 1937, the highway followed a longer route through Santa Fe; a later realignment created a more direct path through Albuquerque and other communities.
This history explains why mileage figures can differ between sources. Some tables describe the route’s historical mileage, while state-specific descriptions may measure a later alignment. The 487-mile figure is the value shown in the mileage table for the complete route’s state-by-state breakdown.
New Mexico’s Route 66 heritage includes Tucumcari, Santa Fe, Albuquerque, Grants, Gallup and numerous preserved roadside properties. Interstate 40 later replaced much of the highway’s through-traffic role, but many original segments and frontage roads remain associated with Historic Route 66.