Greencastle ES www.montgomeryschoolsmd.org/schools/greencastlees/ 13611 Robey Road Silver Spring, MD 20904 39.080428 -76.942808 Greencastle ES13611 Robey RoadSilver Spring,MD 20904 Bus Routes Phone: 240-740-1420 Fax: 301-902-1222 Mr. Robert (Rob) A.Obstgarten, Principal Elementary Staff Directory