Crystal Brook is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

in Delaware County, New York. It flows into

Beaver Kill The Beaver Kill, sometimes written as the Beaverkill or Beaverkill River, is a tributary of the East Branch Delaware River, a main tributary of the Delaware River, approximately long, in the U.S. state of New York (state), New York. The Kill (bod ...

northwest of Butternut Grove.

References

Rivers of New York (state) Rivers of Delaware County, New York {{NewYork-river-stub