Mammoth Cave National Park Rivers and Streams

The Green and Nolin Rivers possess one of the most diverse fish (82 species) and invertebrate faunas (51 species of mussels) in North America. In addition to the mussels, there are approximately 200 species of benthic macroinvertebrates in these rivers. For these biological reasons, the Green River has been designated an "Outstanding Resource Water". As explained above, since Green River is the base-level stream for the Mammoth Cave System, it has crucial influence on the cave aquatic community since food supply and sediment transport are both affected.

Normal flow of 16 miles of the Green River, 7 miles of the Nolin River, and many miles of cave streams in the park is retarded by a relict dam known as Lock and Dam #6. Habitats for 7 federally listed endangered aquatic species are seriously degraded through reduction of natural flow velocity and resultant siltation. The quality of recreational non-motorized boating is also seriously diminished by the 21 miles of pooled river within the park.

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Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
Featured Wildlife
The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.