The most direct route to work is the most dangerous so I go the long way around and that adds a few miles to the commute for a total of a minimum of 20 miles a day but usually I do 35 if the weather cooperates and 50+ miles a day when the weather is good and I have more time to ride.
I'm a 50 year old woman who rides a Cannondale R500 year-round or when the weather allows. Been riding steady for going on 12 years but the last year and a half have not been bike-commuter friendly. Between the rain - snow - ice, the cold and the WIND (constant it seems for the last year and a half), my mileage is way down at the moment but hoping that will soon change.