Tongue River Cave

Registration and decontamination of clothing and gear is now required to visit the cave per Forest Order.

Mapped in 1969 by the National Speleological Society, Tongue River Cave contains 1.23 miles of passages.

[5] The active and abandoned river channels intersect approximately 1/2 mile into the cave in a large chamber known as the Boulder Room.

Attempts have been made to explore the cave's underwater portion, but low water temperatures and the difficulty of hauling adequate scuba equipment through tight passages have hampered the success of such efforts.

Two species of bat inhabit Tongue River Cave, though their sighting has diminished in recent years.