Monoliths

The monoliths along the North Crater Flow Trail have been interpreted in two different manners. First, they may be rafted blocks, pieces of crater walls that were ripped away by a higher silica flow. Second, they are possibly volcanic necks, cooled conduits for a now missing cone (current map). As offtrail travel is prohibited along the North Crater Flow Trail, please view the monoliths from the way-side area.

Source: National Park Service