I started riding 2 miles 5 days a week, to and from work. Then I moved, and commuted 5.5 miles each way, 4 -5 days a week. The ride had some serious hills. Since I didn't own a car, I rode everywhere. I also rode the bus to sections of the bike path (when I could find space on the bike racks).
So far, I've ridden 7 miles this year, but I plan to do a lot more riding, including a metric century in September.