Route 66 became a popular route because of the active promotion of the U.S 66 Highway Association, which advertised it as “the shortest, best and most scenic route from Chicago through St. Louis to Los Angeles.”
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Perhaps the most compelling reason to follow Route 66 is to experience the road's ingrained timeline of contemporary America. Before it was called Route 66, and long before it was even paved in 1926, this corridor was traversed by the National Old Trails Highway, one of the country's first transcontinental highways.
Avery is remembered as The Father of Route 66. To further the popularity of Route 66, John Steinbeck proclaimed Route 66 the Mother Road in his 1939 book The Grapes of Wrath. Like Route 40 and the National Road, Route 66 has shared the title The Main Street of America.
While the Grand Canyon isn't technically on Route 66, it's worth a detour. The South Rim is the most accessible from the route and has the best viewpoints; although that does make it the most popular with visitors.
In some states Rt 66 is not well- marked and it was often difficult to find where it picks up when one section of it ends. But all in all it is worth the effort if you want to see some almost forgotten bits of Americana. Lots of worthwhile stops along the way, but they are scattered across 2,400 miles.
Portions of the road have now been designated as National Scenic Byways or as “Historic Route 66” in several states including Arizona, New Mexico, Illinois, and Missouri. Vintage Shell gas station (left) built in 1926 on Route 66 in Mount Olive, Illinois (photo taken between 1980 and 2006).