Tri-Valley Secondary School is located on 34 Moore Hill Road, near the Rondout Reservoir, east of Grahamsville, New York. It educates students from pre-kindergarten to twelfth grade and is within the Tri-Valley Central School District. It gets its name from the three streams that rise in that area of the Catskill Mountains, Rondout Creek, Chestnut Creek, and the Neversink River.