sentences:  The word "calabazas" is found on a diseño of part of the Agua Caliente land grant in 1840, just west of the "Arroyo de los Guilicos".Gudde felt that this stream may be an early record of Calabazas Creek, although the Los Guilicos Warm Springs are a little west of Calabazas Creek.One of Sonoma County's oldest stone arch bridges, from the year 1915, spans Calabazas Creek near Dunbar School.