This is a visual history of the Loop (CTA), the 1.79-mile (2.88 km) long circuit of elevated railroad that forms the hub of the Chicago "L" system in Chicago, Illinois.

1895-1897	1897–1900
Clark/Lake Chicago River Chicago River Fifth/Lake State/Lake Randolph/Wabash Madison/Wabash Adams/Wabash	Clark/Lake Chicago River Chicago River Fifth/Lake State/Lake Randolph/Fifth Randolph/Wabash Madison/Fifth Madison/Wabash Adams/Wabash Quincy State/Van Buren Pacific/Van Buren Dearborn/Van Buren
1900–1913	1913–1931
Chicago River Chicago River Clark/Lake State/Lake Randolph/Fifth Randolph/Wabash Madison/Fifth Madison/Wabash Adams/Wabash Quincy State/Van Buren Pacific/Van Buren Dearborn/Van Buren	Chicago River Chicago River Clark/Lake State/Lake Randolph/Wells Randolph/Wabash Madison/Wells Madison/Wabash Adams/Wabash Quincy State/Van Buren LaSalle/Van Buren Dearborn/Van Buren
1931–1949	1955–1958
Chicago River Chicago River Clark/Lake State/Lake Randolph/Wells Randolph/Wabash Madison/Wells Madison/Wabash Adams/Wabash Quincy State/Van Buren LaSalle/Van Buren Dearborn/Van Buren	Chicago River Chicago River Clark/Lake State/Lake Randolph/Wells Randolph/Wabash Madison/Wells Madison/Wabash Adams/Wabash Quincy State/Van Buren LaSalle/Van Buren
1958–1969	1969–1993
Chicago River Chicago River Clark/Lake State/Lake Randolph/Wells Randolph/Wabash Madison/Wells Madison/Wabash Adams/Wabash Quincy State/Van Buren LaSalle/Van Buren	Chicago River Chicago River Clark/Lake State/Lake Randolph/Wells Randolph/Wabash Madison/Wells Madison/Wabash Adams/Wabash Quincy LaSalle/Van Buren State/Van Buren
1993–1997	1997–present
Chicago River Chicago River Clark/Lake State/Lake Randolph/Wells Randolph/Wabash Washington/​Wells Madison/Wells Madison/Wabash Adams/Wabash Quincy LaSalle/Van Buren	Chicago River Chicago River Clark/Lake State/Lake Randolph/Wabash Washington/​Wells Washington/​Wabash Madison/Wabash Adams/Wabash Quincy LaSalle/Van Buren Library

References