There are also plenty of other rides you could do before the Sea Gull next year -- various metrics and half-metrics -- to help you get in shape for it and have some fun along the way.

I like these alot --

http://endhungercalvert.org/bike/

http://www.ohbike.org/events/rural_legacy_eflyer.html

They are both in southern Maryland, on the western side of the Chesapeake, if that's not too far from you.