Flat land...I am jealous! I live between two huge drumlins (hills left by glaciers) and the surrounding area isnt too flat. Not steep, but rolling.
Congrats, and I am slowly working my cycling mileage up...I think next time out is my 15ish mile loop I used to do all the time when I had a road bike. But my hybrid I feel safer and more comfortable on. Granted these are my weekday loops, weekends my girlfriend and I will go 22 miles or so together. This weekend will be no cycling, but lots of paddling in our tandem kayak

My upper body needs a workout, too!
Beautiful area you have though. Looks like that around here, too. Lots of farmland and woods