You don't have to go far from Milwaukee, go southwest towards Mukwanago and East Troy.
Than you have the Northern and Southern Kettle Moraine forests.
Head out towards the Lake Geneva area and stay on the back roads all the way.
You also have the a lot of good riding around Holy Hill, about 25 mi. north west of Milwaukee.
The state also has a webpage of Rustic roads
http://www.dot.wisconsin.gov/travel/scenic/rusticroads.htm
Many miles of nice riding in this area
Than you have the Northern and Southern Kettle Moraine forests.
Head out towards the Lake Geneva area and stay on the back roads all the way.
You also have the a lot of good riding around Holy Hill, about 25 mi. north west of Milwaukee.
The state also has a webpage of Rustic roads
http://www.dot.wisconsin.gov/travel/scenic/rusticroads.htm
Many miles of nice riding in this area