Metro

Great deal since you can go unlimited rail travel with the full 7-Day Fast Pass at $59.25 per person over five years old.  Up to two children, four years and younger, ride free with each adult paying full fare. Children five and older pay adult fares.

A even better fare for large families are the 7-day Short Trip Passes for $36 per person over five years old. But note the limit to off-hour times listed below, but is still great for most tourist families that are out after breakfast and in somewhat earlier that evening.  You can also pay the difference if the schedule does not work on a certain day.

  • Weekdays from opening to 9:30 a.m. and between 3:00 and 7:00 p.m.
  • From midnight until closing on Friday and Saturday nights.

http://www.wmata.com/fares/purchase/passes.cfm

Metro Parking Rates
http://www.wmata.com/rail/parking/parking_detail.cfm?station=all

Parking at Metro Lots Can Fill Up
http://greatergreaterwashington.org/post/27477/which-metro-parking-lots-fill-up-and-which-dont/

Google Maps with change time option for rush hours
https://www.google.com/maps?output=class