Warner Pine Grove Memorial Cemetery is on Turkey Hill Road at the edge of the Belchertown State School property and was their burial grounds. The first burial at this institutional cemetery was on July 21 1925 for a Eva Landry who had died 3 days earlier.
That is the official story at least but there do exist earlier burials at the institution.
See the John Lee burial of May of 1925
See the Gertrude Sutton burial of May of 1925
Earlier burials might have been at the South Cemetery in town. See the Gertrude Benson burial of March of 1925.
and the Robert Tulloch burial of April 1925
and the John Scott burial