Hours Of Operations High's of Baltimore Maryland Thurmont 21788 High's of Baltimore Hours of Operation and Location in Thurmont, MD 21788 4.0 - 18 votes 201 Frederick Rd, Thurmont, MD 21788 (301) 271-4147 Get Directions High's of Baltimore Hours Category: Grocery & Market Hours Hours may vary due to season or holiday reasons. For specific hours, please contact store directly. Map Explore ThurmontView More Apparel New York Recommend For You Shaw's SIMPLE Mobile H2O Wireless Verizon Wireless Dollar Store ADT American Standard At Home Goodwill El Toro Market