1909 Map of Mount Airy

About this map

Parrs Ridge forms the high spine of this central Maryland landscape, a divide where the headwaters of the Patapsco River and the Patuxent River begin their paths toward the Chesapeake. The Baltimore and Ohio Railroad provides the primary industrial axis, cutting through Mount Airy and passing several numbered stations such as Plane No 4. This rail-and-road network supported a thriving milling and agricultural economy at the turn of the century, evidenced by sites like Shipleys Mill, Carrs Mill, and Roxbury Mills. The map details the complex intersection of Frederick, Carroll, Howard, and Montgomery counties, showing a dense web of turnpikes and rural roads connecting established hamlets like Libertytown, Taylorsville, and Lisbon. Traditional infrastructure remains prominent, with a Tollgate still noted along the road near Poplar Springs.