I commute mainly. It used to be about 18 miles round trip when I lived in DC. Now it's only 4 and a half round trip but I'm doing delivery work during the day so who knows the daily mileage. Deliveries are all pretty short though. And I'm car-free, so I ride to the store, friend's houses, etc.--3-4 miles max.
A long ride for me is maybe 40 or 50 miles. I'll do those every once in a while on my days off. I mean...it depends on the terrain, I could ride all day in phlat Philly, but out in the burbs or in DC, it's a little tougher.