UPDATE: As I use MapMyRide for route tracking and other stuff it seems only fair to share the links with you! It's a free download for iPhone/Android and is super useful!
Oxford to Woodstock (Via Farmoor) - http://www.mapmyride.com/routes/view/332832317
Woodstock to Oxford (via Bletchingon/Kidlington) - http://www.mapmyride.com/routes/view/332834687
A wonderful cycle around some first class countryside - with a coffee stop at Farmoor Reservoir , lunch at the Black Prince in Woodstock before wrapping back around and heading back into Oxford via Kidlington and Summertown.
We'll be going at a nice steady pace, certainly won't be a race, so don't feel like you need a super awesome bike or be an olympic athlete to come along - no-one gets left behind :-)
Please RSPV if your coming so I can call ahead and book space for lunch.