A roughly 100-mile tour of oddball locations around the edge of Chicago. The ride moves at roughly 10 MPH with plenty of stops for sightseeing, snacking and skinny-dipping.
Here's a write-up that will give you an idea of what to expect: http://tinyurl.com/perimeterride
No pre-registration needed or ride fee, but a $10 donation to the Greater Chicago Food Depository is requested on the day of the ride.
The ride ends some time after midnight at The Handlebar.