The Minnesota Department of Transportation publishes state-wide bicycle maps. The last editions (MN East and MN West) were published in approximately 2001. Because these maps classify state highways and major roads by volume and bike-friendliness (shoulder width, pavement, etc.), you can well imagine that 10 years on these maps are highly dubious guides to state routes.
MNDOT is working on updates to those maps, however, and are running a survey of Minnesota cyclists for input to the project.
The survey asks about your bicycling habits, and also what information you would find most helpful on a new map set.
It only takes a few minutes, so do help MNDOT gather this data for their ongoing project!