25 miles in total. Gentle roads near beach plus a trail near Pine Creek Road. Lots of interesting houses.
Route taken on Google Maps:
http://maps.google.com/maps?q=http://gerstein.info/gps/BikeFairfield-Jun08.kmz
Useful additional routes and points of interest:
http://del.icio.us/mbgmbg/FunBikeFairfield
Some photos of the trip (many geotagged):
http://www.flickr.com/photos/mbgmbg/tags/bikefairfield