Have you been training for the Dunes to Downtown Ride? Here are some cue sheets and resources to help you go the distance:
All of the above-suggested rides , created by Climate Cyclist Evan Jahn last year, start and end at the REI Lincoln Park store on Halsted.
Our friends at The Chainlink have a wealth of resources to help you with maps and routes, here: http://www.thechainlink.org/page/maps-and-route-tools
The City of Chicago also has a clickable Bike Map with lots of useful information for cycling in Chicago.