The Newberry National Volcanic Monument is packed with geologic curiosities left by the Newberry Volcano. Two of the most astonishing attractions call for short hikes—an underground stroll through mile-long Lava River Cave and a paved loop through the Lava Cast Forest. The two trails are short enough, and close enough together, that you can do both in a single afternoon.

Start with Oregon’s longest and most hikable lava tube, Lava River Cave. Drive . . .

This chapter is an excerpt from 100 Hikes : Central Oregon Cascades