South Lake ES www.montgomeryschoolsmd.org/schools/southlakees/ 18100 Washington Grove Ln. Gaithersburg, MD 20877 39.155489 -77.197417 South Lake ES18100 Washington Grove Ln.Gaithersburg,MD 20877 Bus Routes Phone: 240-740-7330 Fax: 301-548-4966 Ms. Celeste D. King, Principal Elementary Staff Directory