I basically live in the summers there so I already knew it's red rocks, but you might want to pick a photo next time that doesn't have the name in the link...
trust me (And runningman) its dupont. there are only three with the platforms on the outsode of the trains: Dupont, metro center, chinatown. but both metro center and chinatown have connecting lines, where as dupont does not. thus it must be dupont.