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I kept this at start-class because it seems a bit short, there are some formatting errors (such as missing periods), and the main history source is not a reliable source. --NE2 09:11, 4 January 2008 (UTC)
For history sources, there's a 1918 map at , which can be compared against a low-quality scan of a 1918 map at ; it appears that the original route was through Cuba City to near Dickeyville, then south to the Illinois state line. A 1925 (?) list, transcribed at Wikipedia:WikiProject Wisconsin Highways/Early highway history, says East Dubuque. --NE2 10:37, 4 January 2008 (UTC)
The change to WIS 11 was in 1934, and was made in part because of US 20:  I'm unable to pin down the extension to La Grange. --NE2 10:48, 4 January 2008 (UTC)