Maryland Department of Natural Resources

Monocacy River Cave, Frederick County

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Monocacy River Cave (photo by Dennis Slifer)
Monocacy River Cave

Monocacy River Cave is developed in thinly-bedded Frederick Limestone.


This small cave is 20 feet above the east bank of the Monocacy River, east of Hansonville (just above the power line). The entrance is 4 feet wide and 2 feet high, at the base of a small cliff. The cave extends for 25 feet to the southeast as a crawlway and continues as a 10-inch tube. The floor is composed of river alluvium.

Frederick Valley Cave Index Map

Frederick County cave index map
  • ( 9) Monocacy River Cave