The RideWithGPS maps in our route guides are color-coded to provide clarity and more information. We use the following color-coding scheme to identify types of road surfaces.
Black = unknown / undocumented surface type
Red = paved road
Brown = gravel / dirt road
Blue = single track trail
Purple = paved bike path / Roubaix (rough, broken pavement)
Dashed lines = unpaved surface
Sold lines = paved surface