My commute is maybe 2 miles, so not exactly building up much of a base there. I figure I can easily add on 10 miles at the end of the day and about 1000ft of climbing....so around 15 miles a day during the weekdays. Use the weekends for gradually longer rides.

Had some cramping issues last summer around the 40mile mark...never happened before and didn't seem to matter much if I had eaten etc.