73 years old and retired now, but back when my kids were young I used my bike to get to work, 60 km round trip, so I was riding at least 300 km per week. I was lucky that even though my office was in downtown Montreal I could get there riding along the historic Lachine canal. Combined with easy weekend rides I was doing at least 10000 km per year. If you are able to commute to work, you can rack up plenty of mileage