Template:Wp-Lyon Mountain, New York

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Lyon Mountain is a hamlet and census-designated place located in the town of Dannemora in Clinton County, New York, United States. The population was 423 at the 2010 census.

The northern slopes of Lyon Mountain are in the southern part of the community, with the summit to the south in the town of Saranac.

The Lyon Mountain Correctional Facility, a minimum security prison, was located in the community. The facility closed in 2011, and has been purchased by a Canadian who has mined sand for hydrofracking from the site.