Today Shake Shack announced that they're opening their first location in Washington, DC, in the first half of 2011. It'll be located near Dupont Circle at 1216 18th Street Northwest (map). In case you've lost track, they have locations in New York City in Madison Square Park, the Theater District, the Upper West Side, the Upper East Side, Citi Field, and have plans to open one in Battery Park City next year. They have locations outside New York City in Miami and Saratoga Springs. For more information, visit shakeshack.com.