I wish I could get out "most days". I ride 3 - 4x a week. My rides start at the trail head. I generally ride from 10 - 16 miles. These rides are anywhere from two hours to 3.5 hours. Average mph is anywhere from 5 to 7. That means a lot of heavy climbing. I don't worry about how many miles. I'm just out there to be fit and have fun. I figure if I did a road ride at the same intensity I would be riding more like 50 miles per ride. It's comparing apples to oranges IMO.