rosemont-es.mcpsmd.org/ 16400 Alden Avenue Gaithersburg, MD 20877 39.125 -77.18528000000001 Rosemont ES16400 Alden AvenueGaithersburg,MD 20877 Phone: 240-740-7180 Fax: 301-548-7512 Dr. Keely R. Cooke, Principal Elementary Staff Directory