Hiking in Mojave National Preserve
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These vertical walls of rhyolite tuff (pronounced toof), which look like Swiss-cheese cliffs made of unpolished marble, are the result of a powerful prehistoric volcanic eruption that blasted rocks across the landscape. Learn how the site got its name by hiking the 0.5-mile Rings Loop Trail where metal rings lead down through a narrow slot-canyon once used by Native Americans to escape 19th-century ranchers.

Hole-in-the-Wall lies east of Kelso-Cima Rd via the unpaved Cedar Canyon Rd. Coming from I-40, exit at Essex Rd.