• Speleothems in Miller's Chapel.

    Oregon Caves

    National Monument Oregon

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  • Cave Creek Campground Closed

    Cave Creek campground located at Mile Marker 16 is currently closed due to hazard trees.

Environmental Factors

The cave at Oregon Caves National Monument is a solution cave formed in a marble outcrop located in Siskiyou mountain range of Southwest Oregon.

The marble formed as a consequence of tectonic activity. Limestone of the Juan de Fuca oceanic plate subducted under the North American continental plate and was metamorphosed (recrystallized) into marble. The intense faulting and folding incurred by the marble resulted in a geosynclinic karst system. The predominant rectilinear branchwork passages are a result of the steep upper profile of the bedding planes.

The surrounding forest, watershed, and temperature can influence the cave. To learn how read more!

Did You Know?

Scorpion under ultraviolet-DYK

Scorpions fluoresce or glow under ultraviolet (UV) black light. They can glow electric green or blue. Scorpions fluoresce because they contain a fluorescent protein in the upper layer of their exoskeleton. This layer is like your fingernail, but even more protective and tough. The special protein inside is thought by scientists to serve as an ultraviolet sensitivity mechanism, perhaps allowing the scorpion to avoid burning itself by staying exposed too long to damaging light levels.