Several stones from the Devils Postpile can be seen at the entrance to the United States Geological Survey headquarters lot in Reston, Virginia.Although the basaltic columns are impressive, they are not unique.

The source of the lava is thought to have been somewhere near Upper Soda Springs campground at the north end of Pumice Flat on the floor of the Middle Fork of the San Joaquin River, from where it flowed to the site of the Postpile.

Estimates of the formations thickness range from 400 feet (120 m) to 600 feet (180 m).

Columnar basalt can also be seen in a high desert dry river falls area just north of Lajitas, Texas.

The much more massive Devils Tower National Monument in Wyoming is superficially similar but consists of a phonolite porphyry, formed by the intrusion of igneous rock.

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Eat them on their own, or pair with a sandwich or green salad.

In addition, the John Muir Trail and Pacific Crest Trail merge into one trail as they pass through the monument.

but it has been officially styled as plural without the apostrophe since the 1930s.

The Postpile's columns average 2 feet (0.61 m) in diameter, the largest being 3.5 feet (1.1 m), and many are up to 60 feet (18 m) long.