Opalescent River

Opalescent River
Painting of a flume in the Opalescent River by Alexander H. Wyant
Location
CountryUnited States
StateNew York
RegionAdirondacks
CountyEssex
Physical characteristics
SourceLittle Marcy Mountain
  locationAdirondack Mountains, New York, United States
  elevation4,200 ft (1,300 m)
Mouth 
  coordinates
44°01′05″N 74°03′10″W / 44.0181°N 74.0528°W / 44.0181; -74.0528

The Opalescent River is a river in Essex County, New York. It is both a tributary of and the longest source of the Hudson River. Part of the river is designated by New York State as a Wild River in the Wild, Scenic, and Recreational Rivers system.