Disturbing and moving rocks to form channels and rock dams is illegal in the park!

Moving rocks is harmful to both fish and aquatic insects that live in the streams. Many fish species that live in the park spawn between April and August. Some of these fish build their nests in small cavities under rocks and even guard the nest. When people move the rock, the nest is destroyed and the eggs and/or young fish die.

Aquatic insects need rocks for cover as well. Some aquatic insects can drift off or move when disturbed, but many species attach themselves to the rock and cannot move. When a rock is moved, aquatic insects fall, are crushed by the movement, or dry out and die when the rock is placed out of water.

One of the fundamental policies of the National Park Service is to preserve natural resources in an unaltered state. Consequently, it is against the law to move rocks in the stream. Please abide by these rules so that future generations may enjoy the park as well.

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