• Speleothems in Miller's Chapel.

    Oregon Caves

    National Monument Oregon

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  • Haunted Candlelight Tours

    Haunted Candlelight Tours Offered Sunday, October 26 through Friday, October 31, 2014. The tour begins at 4pm and are first come first serve. The tour is limited to 12 people per group.

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?

This snail was named after an employee of Oregon Cave, not because he was slow but because he wrote the technical description of the snail.

There is a snail that lives on the marble rock outcrops of Oregon Caves that has adapted to use the calcium from the rock to make its shell.