This map, “Sketch of the Military Topography [of] Baltimore and its Vicinity,” was commissioned by British Gen. Winder and is not drawn to scale, making it impossible to georeference.

Street Closures: Friday, May 23rd, 2:00 p.m. until Monday, May 26th, 12:00 a.m. WS N. Gay Street, between E. Baltimore Street and E. Lexington Street. SS E. Fayette ...

The official course map and all-important elevation chart can be found here, while the street-by-street directions can be found here. Both are courtesy of the Baltimore Marathon’s official website.

The map shows the estimated percentage of homes with more than 100 books in areas of the city - and for the vast majority of East and West Baltimore, that figure is in the single digits.