Watkins Mill High School Montgomery County Public Schools 10301 Apple Ridge Road Gaithersburg, MD 20879 View map location Phone:  301-840-3975 Fax:  301-840-3950 Head of School:  Peter Cahall Public School, Grades 9-12 School Enrollment:  1,900 IB Students:  IB Coordinator:  Lisa Ingram E-mail: Lisa_A_Ingram@mcpsmd.org Web Site:  Watkins Mill High School IB Courses Offered Start