From the Stadium Access Road (which circles RFK Stadium), stay to the left past the 295 bridge exit, then fork right onto C Street NE (the fork is just before the Access Road passes Lot 4). At the next intersection, turn right onto Oklahoma Avenue, and another immediate right into the RFK Auxiliary Field parking lot.
Take the Metro Orange/Blue/Silver Line to the Stadium/Armory stop. Walk north on 19th Street past East Capitol Street (Stadium will be off to the right). Turn right on D street NE, cross Oklahoma Ave — RFK Auxiliary fields will be straight ahead.