A national nonprofit group is traveling the country this summer to bring attention to its goal: having America's most famous highway designated a National Historic Trail.

Historic Route 66, which passes through Arizona and seven other states on its way from Chicago to Los Angeles, is the focus of the trip by the National Trust for Historic Preservation, KTAR radio in Phoenix reported. 

The tour is scheduled to be in Arizona July 26-31, although details of the stop had not been worked out. You can visit the National Trust's website for updated information.

It's up to Congress to decide whether something should get the designation. Currently, there are 19 designated National Historic Trails, including the Lewis and Clark route and Alabama's Selma to Montgomery march, KTAR reported.

There's plenty to celebrate about Route 66 in Arizona, as we noted in the May 2015 issue of Arizona Highways. The Grand Canyon State has several surviving segments of the trail that are in use today, including the route from Seligman to Kingman and the drive from Kingman to the Colorado River (via Oatman). Additionally, Petrified Forest National Park is the only National Park Service site that includes a portion of the Mother Road.