http://www.wmata.com/fares/smartrip/senior.cfm
Note: Effective June 29, 2008, Metro no longer accepts applications for the copper senior ID card, and will not renew any expiring senior cards. All active Metro senior ID cards will be honored at sales locations until the active card reaches its expiration date. All Senior SmarTrip® cards will also be honored whether the color is yellow or blue. For locations of sales offices, regional commuter stores and local libraries, see Metro sales locations or call the SmarTrip® Regional Customer Service Center at 1-888-762-7874.