Trout River is a hamlet in Franklin County, New York, United States, located very close to the New York/Quebec border. Its neighboring communities are Trout River, Quebec, to the north; Constable, to the south; and Westville, to the west. It is located at the corner of highway 30 and highway 20. To the south of the hamlet lies Trout River State For…Trout River is a hamlet in Franklin County, New York, United States, located very close to the New York/Quebec border. Its neighboring communities are Trout River, Quebec, to the north; Constable, to the south; and Westville, to the west. It is located at the corner of highway 30 and highway 20. To the south of the hamlet lies Trout River State Forest.