description Dewdrop Cave Overview
Dewdrop Cave is a lava tube in Craters of the Moon National Monument and Preserve in Idaho. It formed in basaltic lava and is one of the park caves open to visitors under the National Park Service's cave-permit system. The cave has a bouldered entrance and is dark beyond the entrances, with rough, uneven ground that can require scrambling or crawling. It is suited to visitors seeking a short, self-guided caving experience.
help Dewdrop Cave FAQ
Where is Dewdrop Cave?
Dewdrop Cave is in Craters of the Moon National Monument and Preserve in Idaho. It is one of the park's lava-tube caves that can be visited under the National Park Service cave-permit system.
Do I need a permit to enter Dewdrop Cave?
Craters of the Moon uses a cave-permit system for caves open to visitors, so visitors should obtain the required permit before entering Dewdrop Cave. The permit system helps protect both the cave and the people exploring its dark, uneven interior.
What is Dewdrop Cave like inside?
The cave has a bouldered entrance and becomes dark beyond the entrance. Because it is a basaltic lava tube, the interior is a volcanic passage rather than a limestone cave with ordinary solution-formed features.
How did Dewdrop Cave form?
Dewdrop Cave formed in basaltic lava, when a flowing lava channel cooled around the outside while molten material continued moving inside. After the flow drained, the hardened outer passage could remain as a lava tube.
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