Westward Ho!
This 50 mile (GT'ed and revised in 2008) ride is mostly flat, especially the return trip along the canal. There are chances to get food in Byron, Brockport, and Spencerport. If you are lucky, you might even get to see the lift bridges at work in town. A 31 mile cut omits one rest stop and any number of ways are available to cut the ride even more. A stiff west wind could make for a bit of a chore on the outbound route, but you'd fly home. If you have a hybrid or mountain bike, you could even opt to ride the canal path back instead of the road.