The 1926-1953 Route 66 alignment through Amarillo
The original 1926 alignment of Route 66 entered Amarillo from the east via what is now Northeast 8th Avenue, turned south at Pierce Street, and continued west along what is now Southwest 6th Avenue. This routing remained the official Route 66 path through Amarillo from 1926 until 1953, when a new alignment shifted the highway to a more direct east-west route closer to where I-40 would eventually be built. The 27-year period when 6th Avenue carried full Route 66 traffic established the district's commercial character — virtually every building along the corridor was constructed or repurposed during this window to serve Route 66 travelers.
The commercial mix during the 1926-1953 era included gas stations and service garages, motor courts and tourist cabins, diners and cafes, taverns, dance halls, dry goods stores, drug stores with soda fountains, and various other services. The buildings were designed for both the local Amarillo customer base and the steady stream of Route 66 through-travelers, which is why many of the buildings have larger-than-typical display windows and prominent signage — features calculated to catch the attention of drivers passing through town at 25-35 mph.
After the 1953 realignment, 6th Avenue declined as a primary commercial corridor across the 1960s and 1970s. Many of the original Route 66 businesses closed or relocated; some buildings sat vacant for years. The decline preserved the district's architectural integrity, however — there was no urban-renewal incentive to demolish the original buildings or modernize them with mid-century facades. By the time historic preservation interest revived in the 1980s and 1990s, the 6th Avenue corridor had a remarkably intact stock of original 1920s and 1930s architecture.