Which national park in Arizona is bisected by historic U.S. Route 66?

Historic U.S. Route 66 bisects Petrified Forest National Park in northeastern Arizona.

The old highway generally ran east–west through the park, alongside the Atchison, Topeka and Santa Fe Railway and the Puerco River. Interstate 40 later replaced Route 66 as the main through route across the region.

Route 66 was developed in 1926 from parts of earlier roads, including the National Old Trails Road. Within the park, a small grassy section of the original highway remains preserved, while much of the modern traffic follows I-40.

Petrified Forest National Park is best known for fossilized wood from the Late Triassic period. It became a national monument in 1906 and a national park in 1962. The park also includes the colorful Painted Desert and numerous archaeological sites.