High Quality Content by WIKIPEDIA articles! The Brown Line (or the Ravenswood Line) of the Chicago `L` rapid transit system, is an 11.4-mile (18.3 km) route with 28 stations between Chicago`s Albany Park neighborhood and downtown Chicago. It runs completely above ground and is almost entirely grade-separated. It is the third busiest `L` route, with an average of 101,881 passengers boarding each weekday in 2011.