The Allen's Conoco Fillin' Station was built in 1929-1930 by F.D. Mitchell. Route 66 was newly paved in this area, and Mitchell decided to travelers needed a place to stop for fuel.

It was a Conoco gas station for the first few years and later became a Phillips 66 Gas station in 1938.

This station is also known as the "Hole in the Wall Conoco Station." It has been restored and is now a favorite photo opportunity for Route 66 travelers.