All 3 exits ranked by what a road-tripper actually needs: real food choice, easy gas, 24-hour service, and the stops worth a detour. Winners below.
Milepost 2 · 29 places to eat · 10 gas stations · 18 hotels · ♥ Seneca Creek State Park, Lock 22: Pennyfield Lock
Milepost 3 · 22 places to eat · 13 gas stations · 10 hotels · open 24 hours · ♥ National Capital Trolley Museum
Milepost 3 · 18 places to eat · 11 gas stations · 10 hotels · ♥ Gaithersburg Community Museum
← Every I-370 exit in Maryland
Pit Stop shows gas, food, hotels & must-see stops at every exit ahead — free, offline, on iPhone & CarPlay.